Gain-clamped fiber amplifier with a loop mirror configuration

1999 ◽  
Vol 11 (5) ◽  
pp. 533-535 ◽  
Author(s):  
K. Inoue
Keyword(s):  
Fiber Amplifier ◽  
Loop Mirror ◽  
Mirror Configuration

scholarly journals Environmentally stable Er-fiber mode-locked pulse generation and amplification by spectrally filtered and phase-biased nonlinear amplifying long-loop mirror

2019 ◽  
Vol 7 ◽  
Author(s):  
Zhengru Guo ◽  
Qiang Hao ◽  
Junsong Peng ◽  
Heping Zeng
Keyword(s):  
Repetition Rate ◽  
Fiber Lasers ◽  
Fiber Amplifier ◽  
Mode Locking ◽  
Pulse Generation ◽  
Erbium Doped ◽  
Polarization Maintaining Fiber ◽  
Fiber Mode ◽  
Polarization Maintaining ◽  
Loop Mirror

We report on environmentally stable long-cavity ultrashort erbium-doped fiber lasers, which self-start mode-locking at quite low thresholds by using spectrally filtered and phase-biased nonlinear amplifying long-loop mirrors. By employing 100-m polarization-maintaining fiber (PMF) in the nonlinear loop, the fundamental repetition rate reaches 1.84 MHz and no practical limitation is found to further decrease the repetition rate. The filter used in the long loop not only suppresses Kelly sidebands of the solitons, but also eliminates the amplified spontaneous emission which exists widely in low-repetition-rate ultrafast fiber lasers. The bandwidth of the filter is optimized by using a numerical model. The laser emits approximately 3-ps pulses with an energy of 17.4 pJ, which is further boosted to $1.5~\unicode[STIX]{x03BC}\text{J}$ by using a fiber amplifier.

Passive modelocking of 1.3 µm semiconductor laser amplifier in loop mirror configuration

1995 ◽  
Vol 31 (15) ◽  
pp. 1257-1258 ◽  
Author(s):  
H. Ammann ◽  
W. Hodel ◽  
C. Holtmann ◽  
H.P. Weber ◽  
H. Melchior
Keyword(s):  
Semiconductor Laser ◽  
Laser Amplifier ◽  
Loop Mirror ◽  
Semiconductor Laser Amplifier ◽  
Mirror Configuration

scholarly journals Nonlinearity Effect on Multiwavelength fiber laser based on Sagnac loop mirror interferometer

2021 ◽  
Author(s):  
Abdul Hadi Sulaiman ◽  
Nur Maizatul Nadia Najamhuri ◽  
Muhd Amirul Hafizi Sukor ◽  
Aiman Ismail ◽  
Fairuz Abdullah ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Extinction Ratio ◽  
Laser Cavity ◽  
Fiber Amplifier ◽  
Observation Time ◽  
Lasing Spectrum ◽  
Loss Mechanism ◽  
Highly Nonlinear ◽  
Multiwavelength Fiber Laser ◽  
Loop Mirror

This paper demonstrates a multiwavelength fiber laser (MWFL) with erbiumdoped fiber amplifier (EDFA) as gain  medium and Sagnac loop mirror interferometer as filter. Stable and flat lasing spectrum was achieved when highly  nonlinear fiber (HNLF) was inserted into the laser cavity. The number of lasing lines and extinction ratio (ER) was directly influenced by EDFA gain where at maximum setting, 14 lasing lines with ER of 19 dB were generated. The  stable and flat spectrum achieved spanned about 1.6 nm. This is due to the induced intensity dependent loss  mechanism in the cavity by adjusting the half-wave plate of the polarization controller in combination with the  HNLF. The MWFL output showed peak power variation of about 2.1 dB within 100 minutes of observation time.

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