Passively mode-locked laser using an entirely centred erbium-doped fiber (original) (raw)
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169MHz repetition frequency all-fiber passively mode-locked erbium doped fiber laser
Optics Communications, 2010
Passively mode-locked stretched-pulse erbium fiber laser is presented. With all-fiber configuration 111 fs pulses were achieved with the fundamental repetition rate of 169 MHz and an average output power of more than 30 mW. Proposed setup shows excellent stability, reliability and 'turn-key' operation. The impact of the pump power on laser parameters is described.
Optics Express, 2012
We present a comparison between an in-field and in-laboratory 50 km ultralong Erbium fiber lasers actively mode-locked with repetition rate varying from 1 to 10 GHz generating pulses from 35.2 to 68.7 ps. The pulse widths generated at higher frequencies are in agreement with Kuizenga-Siegman theory. However, for lower frequencies the pulses have higher intracavity peak power which allows the soliton effect to take place. Depending on the pump power level, the repetition rate and the cavity length both lasers can operate in active mode-locking or under the influence of the soliton regime that locks the pulse duration according to the dispersion and cavity length. Due to the soliton robustness, this condition eliminates most of the environmental influence in the in-field mode-locking regime and makes both lasers very similar.
Quantum Electronics, 2013
We report an all-fibre ultrashort pulse erbium-doped ring laser passively mode-locked by single-wall carbon nanotubes dispersed in carboxymethylcellulose-based polymer films. Owing to intracavity dispersion management and controlled absorption in the polymer films, the laser is capable of generating both femto-and picosecond pulses of various shapes in the spectral range 1.53-1.56 mm. We have demonstrated and investigated the generation of almost transform-limited, inversely modified solitons at a high normal cavity dispersion.
Effect of doped fiber length on the stretch pulses of a mode-locked erbium-doped fiber laser
Laser Physics, 2012
A passively self-starting mode-locked fiber ring laser is demonstrated using a highly concentrated Erbium doped fiber (EDF) with a saturable absorber. The effect of EDF length on the performance of the laser is investigated. Stable stretched pulses are obtained at wavelength region of 1560nm with a repetition rate ranging from 10.1 to 12.1 MHz and a pulse width stretching from 0.52 to 0.75 ps as the EDF length is reduced from 4.5 to 1.5 m. The repetition rate goes higher as the cavity length decreases when a shorter EDF is used but the pulse width reduces as the EDF length increases since the total group velocity dispersion (GVD) in the cavity is close to zero. © Pleiades Publishing, Ltd., 2012. http://link.springer.com/article/10.1134/S1054660X12070134
Performance characterization of a harmonically mode-locked erbium fiber ring laser
IEEE Photonics Technology Letters, 1995
We describe the performance of a harmonically mode-locked, erbium fiber ring laser. Transform-limited pulses with durations of 20-50 ps at 5.044 GHz repetition rate are obtained. The modulation frequency can be detuned by up to *70 kHz and the lasing wavelength can be varied over the entire erbium gain bandwidth. Pulsewidths and pulse bandwidths are measured as a function of modulation power and frequency detuning. The laser is actively stabilized by locking intra-cavity Fabry-Perot etalon passbands to the laser modes.
Passively mode-locked erbium-doped double-clad fiber laser operating at the 322nd harmonic
Optics Letters, 2009
We report passive mode locking of a soliton erbium-doped double-clad fiber laser operating at the 322nd harmonic of the fundamental cavity frequency. Repetition rates up to 3 GHz have been obtained with pulses of 1 ps duration and 18 pJ of energy. The supermode suppression at the 322nd harmonic is better than 25 dB. In addition, the transition dynamics from a bunched state of pulses to stable harmonic mode locking is presented, revealing a very long time scale.
Self-stabilized passive, harmonically mode-locked stretched-pulse erbium fiber ring laser
Optics Letters, 2002
We have studied a passive, harmonically mode-locked stretched-pulse erbium fiber ring laser with net positive dispersion that is self-stabilized by gain depletion and electrostriction. Periodic pulses with supermode suppression of .75 dB and picosecond jitter are achieved. The pulses are compressible to 125 fs by external chirp compensation. The repetition rate is 220 MHz, and the average power is as high as 80 mW.
Erbium-doped fiber laser simultaneously mode locked on more than 24 wavelengths at room temperature
Optics Letters, 2003
We demonstrate simultaneous mode locking of more than 24 wavelengths at 3 GHz in an actively mode-locked erbium-doped fiber laser operating at room temperature. The multiwavelength operation is achieved when a frequency shifter and an all-fiber 50-GHz periodic filter are inserted into a ring cavity. Active mode locking is performed with an amplitude modulator, and pulses with a FWHM of 30 ps are obtained.
High-power erbium-doped fiber laser mode locked by a semiconductor saturable absorber
Optics Letters, 1995
Using an erbium-doped fiber laser (EDFL) passively mode locked by a semiconductor saturable absorber, we generate 5.5-ps pulses of a 2.3-nJ͞pulse, which are more than three times higher in energy than for other reported EDFL's. We show that, by introduction of a linear loss element within the cavity, multiple pulsing behavior at high pump powers can be suppressed. We also determine the saturable-absorber characteristics -absorbance versus wavelength near band gap -that are necessary to produce short mode-locked pulses. 0146-9592/95/050471-03$6.00/0
Laser Physics, 2008
Based on the nonlinear polarization rotation technique, we report on a stable passive 23rd harmonic mode-locked erbium-doped fiber soliton laser for the first time to the best of our knowledge. In this laser, 23 solitons are uniformly distributed in the cavity simultaneously, and all solitons have the same energy and duration. The increase of the coupler output enhances the dispersive radiation, and the longer cavity strengthens the interaction between solitons and dispersive waves. The two above factors play the key function to generate the 23rd harmonic mode-locked operation.