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Papers by Erdenetsetseg Luvsandamdin

Semiconductor Science and Technology, 2014

ABSTRACT We present the results from distributed feedback (DFB) lasers with emission wavelengths ... more ABSTRACT We present the results from distributed feedback (DFB) lasers with emission wavelengths ranging from 760 to 810 nm and focus on the optimization of Bragg gratings realized with a patterned GaAsP layer that is overgrown with an AlGaAs cladding layer. The impact of the thickness and material composition of the GaAsP grating lines on the DFB laser performance is theoretically and experimentally investigated. 767 nm ridge waveguide DFB lasers with optimized gratings show excellent optoelectronic characteristics in terms of slope efficiency (0.9 W A−1) and linewidth (11 kHz).

SPIE Proceedings, 2014

ABSTRACT We present DFB laser diodes emitting in the 76x nm wavelengths range and focus on design... more ABSTRACT We present DFB laser diodes emitting in the 76x nm wavelengths range and focus on design and fabrication of the integrated Bragg gratings. Grating functionality is obtained with a periodically patterned GaAs0.75P0.25 layer with a thickness of 13 nm. We applied scanning transmission electron microscopy using a high angle annular dark-field detector for the analysis of the buried grating structures and for the improvement of the etching and regrowth conditions. Ridge waveguide DFB lasers with optimized gratings and production process show single mode emission with intrinsic linewidths below 10 kHz. Coated 1.5 mm long ridge waveguide DFB lasers emit stable over 5000 hours at a constant power of 100 mW. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

IEEE Journal of Quantum Electronics, 2015

This paper reports the results of numerical and experimental investigations of the dynamics of an... more This paper reports the results of numerical and experimental investigations of the dynamics of an external-cavity diode laser device composed of a semiconductor laser and an external Bragg grating, which provides optical feedback. Due to the influence of the feedback, this system can operate in different dynamic regimes. The traveling-wave model is used for simulations and analysis of the nonlinear dynamics in the considered laser device. Based on this model, a detailed analysis of the optical modes is performed, and the stability of the stationary states is discussed. It is shown that the results obtained from the simulation and analysis of the device are in a good qualitative agreement with the experimental findings.

Conference on Lasers and Electro-Optics 2012, 2012

ABSTRACT We present a micro-integrated narrow linewidth extended cavity diode laser for Rubidium ... more ABSTRACT We present a micro-integrated narrow linewidth extended cavity diode laser for Rubidium (780.2 nm) atom interferometry experiments in space. The laser is designed for use onboard a sounding rocket to be launched in 2013.

International Conference on Space Optical Systems and Applications, 2011

We present a micro-integrated, high power, narrow linewidth extended cavity diode laser (ECDL) fo... more We present a micro-integrated, high power, narrow linewidth extended cavity diode laser (ECDL) for precision quantum optics experiments at 780 nm onboard a sounding rocket. Although micro-integrated ECDL is based on a Littrow configuration, it features an excellent mechanical stability because any moveable parts were omitted. It provides an overall tuneability of 40 GHz and a continuous tuneability of 4

Optics Express, 2014

We present a micro-integrated, extended cavity diode laser module for space-based experiments on ... more We present a micro-integrated, extended cavity diode laser module for space-based experiments on potassium Bose-Einstein condensates and atom interferometry. The module emits at the wavelength of the potassium D2-line at 766.7 nm and provides 27.5 GHz of continuous tunability. It features sub-100 kHz short term (100 µs) emission linewidth. To qualify the extended cavity diode laser module for quantum optics experiments in space, vibration tests (8.1 g RMS and 21.4 g RMS) and mechanical shock tests (1500 g) were carried out. No degradation of the electro-optical performance was observed.

Applied Physics B, 2013

DOI to the publisher's website. • The final author version and the galley proof are versions of t... more DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal.

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

ABSTRACT We present a micro-integrated and tunable extended cavity diode laser, that provides hig... more ABSTRACT We present a micro-integrated and tunable extended cavity diode laser, that provides high power and narrow linewidth emission for space based precision spectroscopy of the Rb D2-line at 780.24 nm.

CLEO: 2014, 2014

ABSTRACT We developed a very robust diode laser module platform for the deployment of cold atom b... more ABSTRACT We developed a very robust diode laser module platform for the deployment of cold atom based quantum sensors in space. The micro optical benches, not larger than 80 x 25 mm^2, host MOPA and EDCL modules.

This paper reports the results of numerical and experimental investigations of the dynamics of an... more This paper reports the results of numerical and experimental investigations of the dynamics of an external cavity diode laser device composed of a semiconductor laser and a distant Bragg grating, which provides an optical feedback. Due to the influence of the feedback, this system can operate at different dynamic regimes. The traveling wave model is used for simulations and analysis of the nonlinear dynamics in the considered laser device. Based on this model, a detailed analysis of the optical modes is performed, and the stability of the stationary states is discussed. It is shown, that the results obtained from the simulation and analysis of the device are in good agreement with experimental findings.

This paper reports the results of numerical and experimental investigations of the dynamics of an... more This paper reports the results of numerical and experimental investigations of the dynamics of an external cavity diode laser device composed of a semiconductor laser and a distant Bragg grating, which provides an optical feedback. Due to the influence of the feedback, this system can operate at different dynamic regimes. The traveling wave model is used for simulations and analysis of the nonlinear dynamics in the considered laser device. Based on this model, a detailed analysis of the optical modes is performed, and the stability of the stationary states is discussed. It is shown, that the results obtained from the simulation and analysis of the device are in good agreement with experimental findings.

Microgravity Science and Technology, 2016

We present the technical realization of a compact system for performing experiments with cold 87 ... more We present the technical realization of a compact system for performing experiments with cold 87 Rb and 39 K atoms in microgravity in the future. The whole system fits into a capsule to be used in the drop tower Bremen. One of the advantages of a microgravity environment is long time evolution of atomic clouds which yields higher sensitivities in atom interferometer measurements. We give a full description of the system containing an experimental chamber with ultra-high vacuum conditions, miniaturized laser systems, a high-power thulium-doped fiber laser, the electronics and the power management. In a two-stage magnetooptical trap atoms should be cooled to the low µK regime. The thulium-doped fiber laser will create an optical dipole trap which will allow further cooling to sub-µK temperatures. The presented system fulfills the demanding require

Microgravity Science and Technology, Nov 8, 2016

We present the technical realization of a compact system for performing experiments with cold 87 ... more We present the technical realization of a compact system for performing experiments with cold 87 Rb and 39 K atoms in microgravity in the future. The whole system fits into a capsule to be used in the drop tower Bremen. One of the advantages of a microgravity environment is long time evolution of atomic clouds which yields higher sensitivities in atom interferometer measurements. We give a full description of the system containing an experimental chamber with ultra-high vacuum conditions, miniaturized laser systems, a high-power thulium-doped fiber laser, the electronics and the power management. In a two-stage magnetooptical trap atoms should be cooled to the low µK regime. The thulium-doped fiber laser will create an optical dipole trap which will allow further cooling to sub-µK temperatures. The presented system fulfills the demanding require

Proceedings - Electronic Components and Technology Conference

In the development process towards an integration of laser systems into compact modules many key ... more In the development process towards an integration of laser systems into compact modules many key points can be simulated. Yet, a reliable and stable testing environment is needed for a deeper understanding of the system. We present the micro optical bench (MiOB) as an advanced platform for the hybrid micro integration of active and passive optical elements. The modular yet robust design enables the precise mounting of those elements with an accuracy of better than 1 μm. By examples of second harmonic generation, master oscillator power amplifier and external cavity diode laser modules a wide range of applications are addressed. Each module is used to highlight different aspects of the MiOB. Examples are the thermal design of the MiOB that allows the precise heating of selected components without influencing others, the robustness that can withstand different mechanical tests, and the overall stiffness that allows the high precision mounting of volume holographic Bragg gratings.

2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC, 2013

ABSTRACT In this paper we present a very compact, robust, micro-integrated extended cavity laser ... more ABSTRACT In this paper we present a very compact, robust, micro-integrated extended cavity laser (ECDL) for precision quantum optics applications in space or in a micro-gravity environment. It will be used for experiments on Bose-Einstein condensates (BECs) and atom interferometry with potassium atoms onboard a drop capsule at the ZARM drop tower, Bremen, Germany.

Semiconductor Science and Technology, 2014

ABSTRACT We present the results from distributed feedback (DFB) lasers with emission wavelengths ... more ABSTRACT We present the results from distributed feedback (DFB) lasers with emission wavelengths ranging from 760 to 810 nm and focus on the optimization of Bragg gratings realized with a patterned GaAsP layer that is overgrown with an AlGaAs cladding layer. The impact of the thickness and material composition of the GaAsP grating lines on the DFB laser performance is theoretically and experimentally investigated. 767 nm ridge waveguide DFB lasers with optimized gratings show excellent optoelectronic characteristics in terms of slope efficiency (0.9 W A−1) and linewidth (11 kHz).

SPIE Proceedings, 2014

ABSTRACT We present DFB laser diodes emitting in the 76x nm wavelengths range and focus on design... more ABSTRACT We present DFB laser diodes emitting in the 76x nm wavelengths range and focus on design and fabrication of the integrated Bragg gratings. Grating functionality is obtained with a periodically patterned GaAs0.75P0.25 layer with a thickness of 13 nm. We applied scanning transmission electron microscopy using a high angle annular dark-field detector for the analysis of the buried grating structures and for the improvement of the etching and regrowth conditions. Ridge waveguide DFB lasers with optimized gratings and production process show single mode emission with intrinsic linewidths below 10 kHz. Coated 1.5 mm long ridge waveguide DFB lasers emit stable over 5000 hours at a constant power of 100 mW. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

IEEE Journal of Quantum Electronics, 2015

This paper reports the results of numerical and experimental investigations of the dynamics of an... more This paper reports the results of numerical and experimental investigations of the dynamics of an external-cavity diode laser device composed of a semiconductor laser and an external Bragg grating, which provides optical feedback. Due to the influence of the feedback, this system can operate in different dynamic regimes. The traveling-wave model is used for simulations and analysis of the nonlinear dynamics in the considered laser device. Based on this model, a detailed analysis of the optical modes is performed, and the stability of the stationary states is discussed. It is shown that the results obtained from the simulation and analysis of the device are in a good qualitative agreement with the experimental findings.

Conference on Lasers and Electro-Optics 2012, 2012

ABSTRACT We present a micro-integrated narrow linewidth extended cavity diode laser for Rubidium ... more ABSTRACT We present a micro-integrated narrow linewidth extended cavity diode laser for Rubidium (780.2 nm) atom interferometry experiments in space. The laser is designed for use onboard a sounding rocket to be launched in 2013.

International Conference on Space Optical Systems and Applications, 2011

We present a micro-integrated, high power, narrow linewidth extended cavity diode laser (ECDL) fo... more We present a micro-integrated, high power, narrow linewidth extended cavity diode laser (ECDL) for precision quantum optics experiments at 780 nm onboard a sounding rocket. Although micro-integrated ECDL is based on a Littrow configuration, it features an excellent mechanical stability because any moveable parts were omitted. It provides an overall tuneability of 40 GHz and a continuous tuneability of 4

Optics Express, 2014

We present a micro-integrated, extended cavity diode laser module for space-based experiments on ... more We present a micro-integrated, extended cavity diode laser module for space-based experiments on potassium Bose-Einstein condensates and atom interferometry. The module emits at the wavelength of the potassium D2-line at 766.7 nm and provides 27.5 GHz of continuous tunability. It features sub-100 kHz short term (100 µs) emission linewidth. To qualify the extended cavity diode laser module for quantum optics experiments in space, vibration tests (8.1 g RMS and 21.4 g RMS) and mechanical shock tests (1500 g) were carried out. No degradation of the electro-optical performance was observed.

Applied Physics B, 2013

DOI to the publisher's website. • The final author version and the galley proof are versions of t... more DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal.

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

ABSTRACT We present a micro-integrated and tunable extended cavity diode laser, that provides hig... more ABSTRACT We present a micro-integrated and tunable extended cavity diode laser, that provides high power and narrow linewidth emission for space based precision spectroscopy of the Rb D2-line at 780.24 nm.

CLEO: 2014, 2014

ABSTRACT We developed a very robust diode laser module platform for the deployment of cold atom b... more ABSTRACT We developed a very robust diode laser module platform for the deployment of cold atom based quantum sensors in space. The micro optical benches, not larger than 80 x 25 mm^2, host MOPA and EDCL modules.

This paper reports the results of numerical and experimental investigations of the dynamics of an... more This paper reports the results of numerical and experimental investigations of the dynamics of an external cavity diode laser device composed of a semiconductor laser and a distant Bragg grating, which provides an optical feedback. Due to the influence of the feedback, this system can operate at different dynamic regimes. The traveling wave model is used for simulations and analysis of the nonlinear dynamics in the considered laser device. Based on this model, a detailed analysis of the optical modes is performed, and the stability of the stationary states is discussed. It is shown, that the results obtained from the simulation and analysis of the device are in good agreement with experimental findings.

This paper reports the results of numerical and experimental investigations of the dynamics of an... more This paper reports the results of numerical and experimental investigations of the dynamics of an external cavity diode laser device composed of a semiconductor laser and a distant Bragg grating, which provides an optical feedback. Due to the influence of the feedback, this system can operate at different dynamic regimes. The traveling wave model is used for simulations and analysis of the nonlinear dynamics in the considered laser device. Based on this model, a detailed analysis of the optical modes is performed, and the stability of the stationary states is discussed. It is shown, that the results obtained from the simulation and analysis of the device are in good agreement with experimental findings.

Microgravity Science and Technology, 2016

We present the technical realization of a compact system for performing experiments with cold 87 ... more We present the technical realization of a compact system for performing experiments with cold 87 Rb and 39 K atoms in microgravity in the future. The whole system fits into a capsule to be used in the drop tower Bremen. One of the advantages of a microgravity environment is long time evolution of atomic clouds which yields higher sensitivities in atom interferometer measurements. We give a full description of the system containing an experimental chamber with ultra-high vacuum conditions, miniaturized laser systems, a high-power thulium-doped fiber laser, the electronics and the power management. In a two-stage magnetooptical trap atoms should be cooled to the low µK regime. The thulium-doped fiber laser will create an optical dipole trap which will allow further cooling to sub-µK temperatures. The presented system fulfills the demanding require

Microgravity Science and Technology, Nov 8, 2016

We present the technical realization of a compact system for performing experiments with cold 87 ... more We present the technical realization of a compact system for performing experiments with cold 87 Rb and 39 K atoms in microgravity in the future. The whole system fits into a capsule to be used in the drop tower Bremen. One of the advantages of a microgravity environment is long time evolution of atomic clouds which yields higher sensitivities in atom interferometer measurements. We give a full description of the system containing an experimental chamber with ultra-high vacuum conditions, miniaturized laser systems, a high-power thulium-doped fiber laser, the electronics and the power management. In a two-stage magnetooptical trap atoms should be cooled to the low µK regime. The thulium-doped fiber laser will create an optical dipole trap which will allow further cooling to sub-µK temperatures. The presented system fulfills the demanding require

Proceedings - Electronic Components and Technology Conference

In the development process towards an integration of laser systems into compact modules many key ... more In the development process towards an integration of laser systems into compact modules many key points can be simulated. Yet, a reliable and stable testing environment is needed for a deeper understanding of the system. We present the micro optical bench (MiOB) as an advanced platform for the hybrid micro integration of active and passive optical elements. The modular yet robust design enables the precise mounting of those elements with an accuracy of better than 1 μm. By examples of second harmonic generation, master oscillator power amplifier and external cavity diode laser modules a wide range of applications are addressed. Each module is used to highlight different aspects of the MiOB. Examples are the thermal design of the MiOB that allows the precise heating of selected components without influencing others, the robustness that can withstand different mechanical tests, and the overall stiffness that allows the high precision mounting of volume holographic Bragg gratings.

2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC, 2013

ABSTRACT In this paper we present a very compact, robust, micro-integrated extended cavity laser ... more ABSTRACT In this paper we present a very compact, robust, micro-integrated extended cavity laser (ECDL) for precision quantum optics applications in space or in a micro-gravity environment. It will be used for experiments on Bose-Einstein condensates (BECs) and atom interferometry with potassium atoms onboard a drop capsule at the ZARM drop tower, Bremen, Germany.