guillaume Machinet - Academia.edu (original) (raw)

Papers by guillaume Machinet

Research paper thumbnail of Photonic crystal fiber-based components for high power industrial Fs laser applications (Conference Presentation)

Components and Packaging for Laser Systems V, 2019

ALPhANOV has developed expertise around the interfacing and integration of specialty optical fibe... more ALPhANOV has developed expertise around the interfacing and integration of specialty optical fibers. We propose to present new developments concerning 100W-class fiber laser based on Yb-doped Large Mode Area fiber amplifier and a new plug-and-play connector for ultrashort pulse beam delivery by using Hollow Core Photonic Crystal Fibers. In terms of high power fiber amplifier, we recently developed a high performance, fully monolithic PCF amplifier module. The module is based on the DC-200/40-PZ-Yb of NKT Photonics and on a homemade fiber fused component allowing us to couple up to 6 pumps of 50 W at 976 nm together with 5 W of signal, leading to an achieved power of 210 W at 1064 nm, which is to the best of our knowledge the highest power ever delivered by a fully monolithic PCF amplifier. The module is entirely thermally controlled in a rugged package and has run more than 100 days at > 100W average power with an excellent power stability < 1%. Concerning fiber beam delivery solution, hollow core photonic crystal fiber has shown great potential for an industrial solution. To penetrate the industry, high power femtosecond lasers need low-loss stable and plug-and-play connectors to couple light into hollow-core single-mode fibers and carry it to the target. We recently developed such connector and tested it on different industrial femtosecond laser, 50W and 100W class. The new design of the connector compatible with vacuum or noble gas and 300W class femtosecond laser will also be presented.

Research paper thumbnail of nJ-class all-PM fiber tunable femtosecond laser from 1800 nm to 2050 nm via a highly efficient SSFS

Nowadays, the request for femtosecond lasers operating between 1.7 μm and 2 μm is continuously gr... more Nowadays, the request for femtosecond lasers operating between 1.7 μm and 2 μm is continuously growing for many applications. Mode-locked Holmium- or Thulium-doped fiber lasers based on Saturable Absorber Mirror (SAM) are typically the first approach to generate pulses in this spectral range but this technique suffers from a lack of tunability. Indeed, the operating wavelength is fixed by the SAM and the gain fiber. Another way to reach the 2 μm-spectral range consists to exploit the nonlinear phenomena appearing in optical fibers and in particular the Soliton-Self Frequency Shift (SSFS) effect from an Erbium-fiber laser. Several systems based on this phenomenon allowed the generation of ultrashort pulses at different wavelengths and in different type of fibers (step-index, PCF, …). In this paper, we report on the design of a compact and robust all-Polarization-Maintaining (PM) fiber system entirely based on commercial PM components. This system allows to generate a single femtoseco...

Research paper thumbnail of Sub-150 fs all-fiber polarization maintaining tunable laser in the mid-infrared

Nowadays, the request for femtosecond lasers operating between 1.7 μm and 2 μm is continuously gr... more Nowadays, the request for femtosecond lasers operating between 1.7 μm and 2 μm is continuously growing for many applications. Mode-locked Holmium- or Thulium-doped fiber lasers based on Saturable Absorber Mirror (SAM) are typically the first approach to generate pulses in this spectral range but this technique suffers from a lack of tunability. Indeed, the operating wavelength is fixed by the SAM and the gain fiber. Another way to reach the 2 μm-spectral range consists to exploit the nonlinear phenomena appearing in optical fibers and in particular the Soliton-Self Frequency Shift (SSFS) effect from an Erbium-fiber laser. Several systems based on this phenomenon allowed the generation of ultrashort pulses at different wavelengths and in different type of fibers (step-index, PCF, …). In this paper, we report on the design of a compact and robust all-Polarization-Maintaining (PM) fiber system entirely based on commercial PM components. This system allows to generate a single femtoseco...

Research paper thumbnail of 30  TW and 33  fs pulses delivered by a Ti:Sa amplifier system seeded with a frequency-doubled fiber laser

Applied Optics, 2020

We report a full experimental comparison study on the injection of a Ti:Sa multi-terawatt amplifi... more We report a full experimental comparison study on the injection of a Ti:Sa multi-terawatt amplifier chain with a standard 15 fs Ti:Sa oscillator and 35 fs frequency-doubled fiber oscillator. The study highlights that the Ti:Sa oscillator, with high performance in terms of pulse duration and spectral width, can be replaced by the frequency-doubled fiber oscillator to seed Ti:Sa amplifier chains almost without any compromise on the output pulse duration and picosecond contrast. Finally, we demonstrate for the first time to our knowledge a 30 TW and 33 fs Ti:Sa amplifier injected by a fiber oscillator.

Research paper thumbnail of Kerr-lens mode-locked Yb:CaF2 oscillator delivering 2.3 W of 68 fs pulses

Research paper thumbnail of 40 W narrow-bandwidth ps Yb-doped fiber laser at 976 nm and frequency conversion to 488 nm

2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC), 2011

ABSTRACT We report on the generation of 40W of microjoule narrow bandwidth ps pulses at 976nm fro... more ABSTRACT We report on the generation of 40W of microjoule narrow bandwidth ps pulses at 976nm from a Yb-doped fiber system. Subsequent frequency conversion has led to 20W of blue light at 488nm.

Research paper thumbnail of High-energy post-compression in hypocycloid-core Kagome fiber

Advanced Solid State Lasers, 2014

We report nonlinear compression down to 100 fs and 200 µJ pulses using an air-filled hypocycloid-... more We report nonlinear compression down to 100 fs and 200 µJ pulses using an air-filled hypocycloid-core Kagome fiber. The unique properties of such fibers allow us to overcome limitations of standard nonlinear compression waveguides together with an excellent overall efficiency of more than 80%. Such fibers therefore appear as a promising tool for the generation of ultrashort pulses arising from high average power fiber chirped-pulse amplifier with typical energy ranging from 10 to several hundreds of µJ.

Research paper thumbnail of Phase-stabilized Few-cycle Optical Parametric Amplification at 2.1 µm with 10 µJ at 100 kHz

Lasers, Sources, and Related Photonic Devices, 2012

ABSTRACT We report on a new scheme for ultra-broadband optical parametric amplification at 2.1 µm... more ABSTRACT We report on a new scheme for ultra-broadband optical parametric amplification at 2.1 µm delivering CEP-stabilized pulses of duration down to 16 fs (2.2 cycles) and energy up to 10 µJ at 100 kHz.

Research paper thumbnail of Sub-picosecond microjoule-class fiber lasers

CLEO:2011 - Laser Applications to Photonic Applications, 2011

We study the impact of the mode-locking mechanism on the performances of a microjoule-class all-n... more We study the impact of the mode-locking mechanism on the performances of a microjoule-class all-normal dispersion fiber laser featuring large-mode-area photonic crystal fibers.

Research paper thumbnail of Phase-stabilized sub 3-cycle 100 kHz optical parametric amplifier at 2.1 µm

Research in Optical Sciences, 2012

ABSTRACT We report on a new scheme for ultra-broadband optical parametric amplification at 2.1 µm... more ABSTRACT We report on a new scheme for ultra-broadband optical parametric amplification at 2.1 µm delivering CEP-stabilized pulses of duration down to 16 fs (2.2 cycles) and energy up to 10 µJ at 100 kHz.

Research paper thumbnail of High-power sub-50 fs, Kerr-lens mode-locked Yb:CaF2 oscillator pumped by high-brightness fiber- laser

CLEO: 2014, 2014

ABSTRACT We investigated the influence of the spatial pump beam quality on the generation of ultr... more ABSTRACT We investigated the influence of the spatial pump beam quality on the generation of ultra-short pulses in high-brightness Yb:fiber laser-pumped pure Kerr-lens mode-locked Yb:CaF2 oscillators. We report pulse duration as short as 48 fs with an average output power of 2.7 W

Research paper thumbnail of Sub-50 fs, Kerr-lens mode-locked Yb:CaF2 laser oscillator delivering up to 2.7 W

Advanced Solid-State Lasers Congress, 2013

By means of a high-brightness optical pumping scheme with a fiber laser, we demonstrate Kerr-lens... more By means of a high-brightness optical pumping scheme with a fiber laser, we demonstrate Kerr-lens mode locking (KLM) with an Yb:CaF 2 laser crystal. Stable 48 fs pulses are produced at an average power of 2.7 W.

Research paper thumbnail of Continuously tunable sub-ns ytterbium-doped MOPA system for frequency conversion

2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC), 2011

ABSTRACT Our setup is based on supercontinuum source amplified by Yb-fiber amplifiers. The superc... more ABSTRACT Our setup is based on supercontinuum source amplified by Yb-fiber amplifiers. The supercontinuum delivers 100 mW between 800 and 1300 nm with linearly polarized pulses of 900 ps, and a repetition rate of 20 kHz. Because of the low spectral power density of the supercontinuum, the system architecture is based on a dual-stage fiber amplifier to amplify the weak seed source. The tunability is achieved by means of an Acousto-Optic Tunable Filter (AOTF) with a filtering resolution of 10 nm. The diffracted beam is pre-amplified in a 5 m long Ytterbium Doped PM Double Clad fiber. For the power amplifier, pre-amplified pulses (~150 mW average power between 1040-1000nm) are coupled into a 1.2 m long Yb-doped Polarizing Double Clad fiber with a core diameter of 40 μm and cladding diameter of 200 μm backward pumped with a fiber coupled high-power laser diode of a 200 μm fiber (NA 0.22). The fundamental amplified laser beam is frequency converted in a SHG unit based on a 12 mm long critically phase-matched LBO.

Research paper thumbnail of Visible and Infrared Sources based on Three-Level Ytterbium-doped Fiber Lasers

Advances in Optical Materials, 2011

ABSTRACT We present recent work on a variety of Yb-doped fiber laser systems operating on the thr... more ABSTRACT We present recent work on a variety of Yb-doped fiber laser systems operating on the three-level transition at 976 nm, both CW and pulsed, and subsequent frequency doubling.

Research paper thumbnail of Toward Efficient Femtosecond Solid State Yb Amplifiers Pumped by a 976-nm YDFA

Advances in Optical Materials, 2011

... Lett. 23, 355-357 (1998) [4] A. Pugžlys, G. Andriukaitis, D. Sidorov, A. Irshad, A. Baltuška,... more ... Lett. 23, 355-357 (1998) [4] A. Pugžlys, G. Andriukaitis, D. Sidorov, A. Irshad, A. Baltuška, WJ Lai, PB Phua, L. Su, J. Xu, H. Li, R. Li, S. Ališauskas, A. Marcinkevičius, ME Fermann, L. Giniūnas, R. Danielius, “Spectroscopy and lasing of cryogenically cooled Yb, Na:CaF2”, Appl. ...

Research paper thumbnail of Tunable nanosecond ytterbium-doped master-oscillator fiber amplifier system

CLEO:2011 - Laser Applications to Photonic Applications, 2011

ABSTRACT We report a sub-nanosecond fiber laser tunable between 1040-1100 nm and delivering 5 W a... more ABSTRACT We report a sub-nanosecond fiber laser tunable between 1040-1100 nm and delivering 5 W average output power corresponding to 0,25 mJ energy per pulse and peak power of 280 kW.

Research paper thumbnail of 40 W picosecond fiber laser at 976 nm

CLEO:2011 - Laser Applications to Photonic Applications, 2011

ABSTRACT We report on the generation of nearly transform-limited 1-ps pulses at 40 MHz based on a... more ABSTRACT We report on the generation of nearly transform-limited 1-ps pulses at 40 MHz based on amplification in the nonlinear regime at 976nm. The fiber laser system emits pulses with a duration of 1.56 ps and an energy of 1 µJ..

Research paper thumbnail of Femtosecond Fiber Oscillator at 976 nm

CLEO:2011 - Laser Applications to Photonic Applications, 2011

ABSTRACT We report on a passively mode-locked fiber laser emitting around 976 nm. The laser emits... more ABSTRACT We report on a passively mode-locked fiber laser emitting around 976 nm. The laser emits chirped pulses with a duration of 1.02 ps and 12 nJ at 40,7 MHz. External compression leads to pulses as short as 286 fs.

Research paper thumbnail of High Energy Mode-Locked Fiber Laser at 976nm

Advances in Optical Materials, 2011

ABSTRACT We report on a passively mode-locked fiber laser emitting around 976nm. The laser emits ... more ABSTRACT We report on a passively mode-locked fiber laser emitting around 976nm. The laser emits chirped pulses with a duration of 1.02ps and 12nJ at 40,7MHz. External compression leads to pulses as short as 286fs.

Research paper thumbnail of Mode-locked 05 μJ fiber laser at 976 nm

Optics Letters, 2011

We report on high-energy femtosecond pulse generation from an ytterbium-doped rod-type fiber osci... more We report on high-energy femtosecond pulse generation from an ytterbium-doped rod-type fiber oscillator emitting around 976 nm. Self-starting and stable single-pulse operation are demonstrated with 4.2 W of average output power at a repetition rate of 8.4 MHz. The resulting energy level reaches 0.5 μJ. Because of the all-normal dispersion of the laser cavity, output pulses are naturally chirped with a duration of 14 ps. External compression using diffraction gratings shortens the pulse duration down to 460 fs.

Research paper thumbnail of Photonic crystal fiber-based components for high power industrial Fs laser applications (Conference Presentation)

Components and Packaging for Laser Systems V, 2019

ALPhANOV has developed expertise around the interfacing and integration of specialty optical fibe... more ALPhANOV has developed expertise around the interfacing and integration of specialty optical fibers. We propose to present new developments concerning 100W-class fiber laser based on Yb-doped Large Mode Area fiber amplifier and a new plug-and-play connector for ultrashort pulse beam delivery by using Hollow Core Photonic Crystal Fibers. In terms of high power fiber amplifier, we recently developed a high performance, fully monolithic PCF amplifier module. The module is based on the DC-200/40-PZ-Yb of NKT Photonics and on a homemade fiber fused component allowing us to couple up to 6 pumps of 50 W at 976 nm together with 5 W of signal, leading to an achieved power of 210 W at 1064 nm, which is to the best of our knowledge the highest power ever delivered by a fully monolithic PCF amplifier. The module is entirely thermally controlled in a rugged package and has run more than 100 days at > 100W average power with an excellent power stability < 1%. Concerning fiber beam delivery solution, hollow core photonic crystal fiber has shown great potential for an industrial solution. To penetrate the industry, high power femtosecond lasers need low-loss stable and plug-and-play connectors to couple light into hollow-core single-mode fibers and carry it to the target. We recently developed such connector and tested it on different industrial femtosecond laser, 50W and 100W class. The new design of the connector compatible with vacuum or noble gas and 300W class femtosecond laser will also be presented.

Research paper thumbnail of nJ-class all-PM fiber tunable femtosecond laser from 1800 nm to 2050 nm via a highly efficient SSFS

Nowadays, the request for femtosecond lasers operating between 1.7 μm and 2 μm is continuously gr... more Nowadays, the request for femtosecond lasers operating between 1.7 μm and 2 μm is continuously growing for many applications. Mode-locked Holmium- or Thulium-doped fiber lasers based on Saturable Absorber Mirror (SAM) are typically the first approach to generate pulses in this spectral range but this technique suffers from a lack of tunability. Indeed, the operating wavelength is fixed by the SAM and the gain fiber. Another way to reach the 2 μm-spectral range consists to exploit the nonlinear phenomena appearing in optical fibers and in particular the Soliton-Self Frequency Shift (SSFS) effect from an Erbium-fiber laser. Several systems based on this phenomenon allowed the generation of ultrashort pulses at different wavelengths and in different type of fibers (step-index, PCF, …). In this paper, we report on the design of a compact and robust all-Polarization-Maintaining (PM) fiber system entirely based on commercial PM components. This system allows to generate a single femtoseco...

Research paper thumbnail of Sub-150 fs all-fiber polarization maintaining tunable laser in the mid-infrared

Nowadays, the request for femtosecond lasers operating between 1.7 μm and 2 μm is continuously gr... more Nowadays, the request for femtosecond lasers operating between 1.7 μm and 2 μm is continuously growing for many applications. Mode-locked Holmium- or Thulium-doped fiber lasers based on Saturable Absorber Mirror (SAM) are typically the first approach to generate pulses in this spectral range but this technique suffers from a lack of tunability. Indeed, the operating wavelength is fixed by the SAM and the gain fiber. Another way to reach the 2 μm-spectral range consists to exploit the nonlinear phenomena appearing in optical fibers and in particular the Soliton-Self Frequency Shift (SSFS) effect from an Erbium-fiber laser. Several systems based on this phenomenon allowed the generation of ultrashort pulses at different wavelengths and in different type of fibers (step-index, PCF, …). In this paper, we report on the design of a compact and robust all-Polarization-Maintaining (PM) fiber system entirely based on commercial PM components. This system allows to generate a single femtoseco...

Research paper thumbnail of 30  TW and 33  fs pulses delivered by a Ti:Sa amplifier system seeded with a frequency-doubled fiber laser

Applied Optics, 2020

We report a full experimental comparison study on the injection of a Ti:Sa multi-terawatt amplifi... more We report a full experimental comparison study on the injection of a Ti:Sa multi-terawatt amplifier chain with a standard 15 fs Ti:Sa oscillator and 35 fs frequency-doubled fiber oscillator. The study highlights that the Ti:Sa oscillator, with high performance in terms of pulse duration and spectral width, can be replaced by the frequency-doubled fiber oscillator to seed Ti:Sa amplifier chains almost without any compromise on the output pulse duration and picosecond contrast. Finally, we demonstrate for the first time to our knowledge a 30 TW and 33 fs Ti:Sa amplifier injected by a fiber oscillator.

Research paper thumbnail of Kerr-lens mode-locked Yb:CaF2 oscillator delivering 2.3 W of 68 fs pulses

Research paper thumbnail of 40 W narrow-bandwidth ps Yb-doped fiber laser at 976 nm and frequency conversion to 488 nm

2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC), 2011

ABSTRACT We report on the generation of 40W of microjoule narrow bandwidth ps pulses at 976nm fro... more ABSTRACT We report on the generation of 40W of microjoule narrow bandwidth ps pulses at 976nm from a Yb-doped fiber system. Subsequent frequency conversion has led to 20W of blue light at 488nm.

Research paper thumbnail of High-energy post-compression in hypocycloid-core Kagome fiber

Advanced Solid State Lasers, 2014

We report nonlinear compression down to 100 fs and 200 µJ pulses using an air-filled hypocycloid-... more We report nonlinear compression down to 100 fs and 200 µJ pulses using an air-filled hypocycloid-core Kagome fiber. The unique properties of such fibers allow us to overcome limitations of standard nonlinear compression waveguides together with an excellent overall efficiency of more than 80%. Such fibers therefore appear as a promising tool for the generation of ultrashort pulses arising from high average power fiber chirped-pulse amplifier with typical energy ranging from 10 to several hundreds of µJ.

Research paper thumbnail of Phase-stabilized Few-cycle Optical Parametric Amplification at 2.1 µm with 10 µJ at 100 kHz

Lasers, Sources, and Related Photonic Devices, 2012

ABSTRACT We report on a new scheme for ultra-broadband optical parametric amplification at 2.1 µm... more ABSTRACT We report on a new scheme for ultra-broadband optical parametric amplification at 2.1 µm delivering CEP-stabilized pulses of duration down to 16 fs (2.2 cycles) and energy up to 10 µJ at 100 kHz.

Research paper thumbnail of Sub-picosecond microjoule-class fiber lasers

CLEO:2011 - Laser Applications to Photonic Applications, 2011

We study the impact of the mode-locking mechanism on the performances of a microjoule-class all-n... more We study the impact of the mode-locking mechanism on the performances of a microjoule-class all-normal dispersion fiber laser featuring large-mode-area photonic crystal fibers.

Research paper thumbnail of Phase-stabilized sub 3-cycle 100 kHz optical parametric amplifier at 2.1 µm

Research in Optical Sciences, 2012

ABSTRACT We report on a new scheme for ultra-broadband optical parametric amplification at 2.1 µm... more ABSTRACT We report on a new scheme for ultra-broadband optical parametric amplification at 2.1 µm delivering CEP-stabilized pulses of duration down to 16 fs (2.2 cycles) and energy up to 10 µJ at 100 kHz.

Research paper thumbnail of High-power sub-50 fs, Kerr-lens mode-locked Yb:CaF2 oscillator pumped by high-brightness fiber- laser

CLEO: 2014, 2014

ABSTRACT We investigated the influence of the spatial pump beam quality on the generation of ultr... more ABSTRACT We investigated the influence of the spatial pump beam quality on the generation of ultra-short pulses in high-brightness Yb:fiber laser-pumped pure Kerr-lens mode-locked Yb:CaF2 oscillators. We report pulse duration as short as 48 fs with an average output power of 2.7 W

Research paper thumbnail of Sub-50 fs, Kerr-lens mode-locked Yb:CaF2 laser oscillator delivering up to 2.7 W

Advanced Solid-State Lasers Congress, 2013

By means of a high-brightness optical pumping scheme with a fiber laser, we demonstrate Kerr-lens... more By means of a high-brightness optical pumping scheme with a fiber laser, we demonstrate Kerr-lens mode locking (KLM) with an Yb:CaF 2 laser crystal. Stable 48 fs pulses are produced at an average power of 2.7 W.

Research paper thumbnail of Continuously tunable sub-ns ytterbium-doped MOPA system for frequency conversion

2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC), 2011

ABSTRACT Our setup is based on supercontinuum source amplified by Yb-fiber amplifiers. The superc... more ABSTRACT Our setup is based on supercontinuum source amplified by Yb-fiber amplifiers. The supercontinuum delivers 100 mW between 800 and 1300 nm with linearly polarized pulses of 900 ps, and a repetition rate of 20 kHz. Because of the low spectral power density of the supercontinuum, the system architecture is based on a dual-stage fiber amplifier to amplify the weak seed source. The tunability is achieved by means of an Acousto-Optic Tunable Filter (AOTF) with a filtering resolution of 10 nm. The diffracted beam is pre-amplified in a 5 m long Ytterbium Doped PM Double Clad fiber. For the power amplifier, pre-amplified pulses (~150 mW average power between 1040-1000nm) are coupled into a 1.2 m long Yb-doped Polarizing Double Clad fiber with a core diameter of 40 μm and cladding diameter of 200 μm backward pumped with a fiber coupled high-power laser diode of a 200 μm fiber (NA 0.22). The fundamental amplified laser beam is frequency converted in a SHG unit based on a 12 mm long critically phase-matched LBO.

Research paper thumbnail of Visible and Infrared Sources based on Three-Level Ytterbium-doped Fiber Lasers

Advances in Optical Materials, 2011

ABSTRACT We present recent work on a variety of Yb-doped fiber laser systems operating on the thr... more ABSTRACT We present recent work on a variety of Yb-doped fiber laser systems operating on the three-level transition at 976 nm, both CW and pulsed, and subsequent frequency doubling.

Research paper thumbnail of Toward Efficient Femtosecond Solid State Yb Amplifiers Pumped by a 976-nm YDFA

Advances in Optical Materials, 2011

... Lett. 23, 355-357 (1998) [4] A. Pugžlys, G. Andriukaitis, D. Sidorov, A. Irshad, A. Baltuška,... more ... Lett. 23, 355-357 (1998) [4] A. Pugžlys, G. Andriukaitis, D. Sidorov, A. Irshad, A. Baltuška, WJ Lai, PB Phua, L. Su, J. Xu, H. Li, R. Li, S. Ališauskas, A. Marcinkevičius, ME Fermann, L. Giniūnas, R. Danielius, “Spectroscopy and lasing of cryogenically cooled Yb, Na:CaF2”, Appl. ...

Research paper thumbnail of Tunable nanosecond ytterbium-doped master-oscillator fiber amplifier system

CLEO:2011 - Laser Applications to Photonic Applications, 2011

ABSTRACT We report a sub-nanosecond fiber laser tunable between 1040-1100 nm and delivering 5 W a... more ABSTRACT We report a sub-nanosecond fiber laser tunable between 1040-1100 nm and delivering 5 W average output power corresponding to 0,25 mJ energy per pulse and peak power of 280 kW.

Research paper thumbnail of 40 W picosecond fiber laser at 976 nm

CLEO:2011 - Laser Applications to Photonic Applications, 2011

ABSTRACT We report on the generation of nearly transform-limited 1-ps pulses at 40 MHz based on a... more ABSTRACT We report on the generation of nearly transform-limited 1-ps pulses at 40 MHz based on amplification in the nonlinear regime at 976nm. The fiber laser system emits pulses with a duration of 1.56 ps and an energy of 1 µJ..

Research paper thumbnail of Femtosecond Fiber Oscillator at 976 nm

CLEO:2011 - Laser Applications to Photonic Applications, 2011

ABSTRACT We report on a passively mode-locked fiber laser emitting around 976 nm. The laser emits... more ABSTRACT We report on a passively mode-locked fiber laser emitting around 976 nm. The laser emits chirped pulses with a duration of 1.02 ps and 12 nJ at 40,7 MHz. External compression leads to pulses as short as 286 fs.

Research paper thumbnail of High Energy Mode-Locked Fiber Laser at 976nm

Advances in Optical Materials, 2011

ABSTRACT We report on a passively mode-locked fiber laser emitting around 976nm. The laser emits ... more ABSTRACT We report on a passively mode-locked fiber laser emitting around 976nm. The laser emits chirped pulses with a duration of 1.02ps and 12nJ at 40,7MHz. External compression leads to pulses as short as 286fs.

Research paper thumbnail of Mode-locked 05 μJ fiber laser at 976 nm

Optics Letters, 2011

We report on high-energy femtosecond pulse generation from an ytterbium-doped rod-type fiber osci... more We report on high-energy femtosecond pulse generation from an ytterbium-doped rod-type fiber oscillator emitting around 976 nm. Self-starting and stable single-pulse operation are demonstrated with 4.2 W of average output power at a repetition rate of 8.4 MHz. The resulting energy level reaches 0.5 μJ. Because of the all-normal dispersion of the laser cavity, output pulses are naturally chirped with a duration of 14 ps. External compression using diffraction gratings shortens the pulse duration down to 460 fs.