Q-switched mode locking of a fiber laser resonantly pumped Er:YAG ceramic laser at 1645 nm using graphene as saturable absorber

A fiber laser resonantly pumped Q-switched mode locked Er :YAG ceramic 1645 nm laser using graphene as the saturable absorber is realized. The mode-locked pulses with average output power of 320 mW, Q-switching envelope temporal width of 10 μs and mode-locking repetition rate of 83 MHz can readily be generated from the laser. To the best of our knowledge, this is the first report on the graphene-based Q-switching mode locked Er :YAG ceramic laser emitting around 1645 nm.

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Passively harmonic mode-locked fiber laser based on ReS2 saturable absorber

Modern Physics Letters B ◽

10.1142/s0217984917502062 ◽

2017 ◽

Vol 31 (18) ◽

pp. 1750206 ◽

Cited By ~ 21

Author(s):

Feifei Lu

Keyword(s):

Pump Power ◽

Fiber Laser ◽

Output Power ◽

Saturable Absorber ◽

Repetition Rate ◽

Mode Locking ◽

High Repetition Rate ◽

Pulse Interval ◽

Saturable Absorption ◽

Harmonic Mode

We demonstrate the generation of harmonic mode-locking (HML) in an erbium-doped fiber laser with a microfiber-based rhenium disulfide (ReS2) saturable absorber (SA). Taking advantages of both saturable absorption and large third-order nonlinear effect of ReS2, HML pulse with 318.5 MHz repetition rate can be obtained, corresponding to 168th harmonic of fundamental repetition frequency of 1.896 MHz. When the pump power is increased gradually, the pulse interval remains constant, while the output power increases linearly. At the pump power of 450 mW, the output power is [Formula: see text]12 mW. The proposed high-repetition-rate pulse lasers would attract considerable attention due to its potential applications in soliton communications and frequency combs.

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Improved Laser Damage Threshold of In2Se3 Saturable Absorber by PVD for High-Power Mode-Locked Er-Doped Fiber Laser

Nanomaterials ◽

10.3390/nano9091216 ◽

2019 ◽

Vol 9 (9) ◽

pp. 1216 ◽

Cited By ~ 4

Author(s):

Han ◽

Zhang ◽

Jiang ◽

Zhang ◽

Li ◽

...

Keyword(s):

Fiber Laser ◽

Output Power ◽

Saturable Absorber ◽

High Power ◽

Average Output Power ◽

Damage Threshold ◽

Laser Damage Threshold ◽

Average Output ◽

Highly Nonlinear ◽

Er Doped

In this study, a double-end pumped high-power passively mode-locked erbium-doped fiber laser (EDFL) was realized by employing a few-layered In2Se3 flakes as a saturable absorber (SA). Herein, the uniform large-scale In2Se3 flakes were synthesized by the physical vapor deposition (PVD) method. The PVD-In2Se3 SA exhibited a remarkable damage threshold of higher than 24 mJ/cm2. Meanwhile, the PVD-In2Se3 SA had a modulation depth and saturable intensity of 18.75% and 6.8 MW/cm2, respectively. Based on the In2Se3 SA, the stable bright pulses emitting at 1559.4 nm with an average output power/pulse energy/pulse duration of 122.4 mW/5.8 nJ/14.4 ns were obtained successfully. To our knowledge, 122.4 mW was the new major breakthrough of mode-locked Er-doped fiber lasers. In addition, this is the first demonstration of the dark-bright pulse pair generation based on In2Se3 SA. The maximum average output power of the dark-bright pulse reached 121.2 mW, which also showed significant enhancement in comparison with previous works. Our excellent experiment results fully prove the superiority of our experimental design scheme and indicate that the PVD-In2Se3 could operate as a promising highly-nonlinear photonic material for a high-power fiber laser.

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Stable Q-Switched Mode-Locking of 2.7 μm Er:Y2O3 Ceramic Laser Using a Semiconductor Saturable Absorber

Applied Sciences ◽

10.3390/app8071155 ◽

2018 ◽

Vol 8 (7) ◽

pp. 1155 ◽

Cited By ~ 1

Author(s):

Hao Xue ◽

Li Wang ◽

Wei Zhou ◽

Haotian Wang ◽

Jun Wang ◽

...

Keyword(s):

Saturable Absorber ◽

Average Output Power ◽

Doping Concentration ◽

Modulation Depth ◽

Mode Locking ◽

Average Output ◽

Stable Mode ◽

High Brightness ◽

Semiconductor Saturable Absorber ◽

Ceramic Laser

This paper studies synchronous Q-switch and mode-locking of an 2.7 μm Er:Y2O3 ceramic laser pumped with a high brightness 976 nm fiber laser and using a semiconductor saturable absorber mirror. The Er:Y2O3 ceramic is home-developed with Er3+ doping concentration of 7 at.%. The laser generated ~92 mW of average output power with stable mode-locked pulses of 100% modulation depth and 130 MHz repetition rate embedded inside Q-switched envelopes of ~1.2 μs width. Repetition rates of the Q-switched pulse envelopes are tunable from 5.1 kHz to 29 kHz with the width varying from 2.7 μs to 1.2 μs.

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RESEARCH AND DEVELOPMENT OF DIODE-PUMPED PASSIVELY Q-SWITCHED Nd:YVO4 LASERS USING Cr4+:YAG CRYSTAL AS SATURABLE ABSORBER

ASEAN Journal on Science and Technology for Development ◽

10.29037/ajstd.193 ◽

2017 ◽

Vol 24 (1&2) ◽

pp. 139-146

Author(s):

Nguyen Trong Nghia ◽

Trinh Dinh Huy ◽

Le Thi Thanh Nga ◽

Nguyen Dai Hung

Keyword(s):

Research And Development ◽

Output Power ◽

Saturable Absorber ◽

Average Output Power ◽

Repetition Rate ◽

Average Output ◽

Optical Efficiency ◽

Output Mirror ◽

Diode Pumped ◽

Maximal Average

The results in research and development of diode-pumped passively Q-switched Nd:YVO4 lasers are presented with Cr4+:YAG crystal used as an intra-cavity saturable absorber. Using a-cut Nd:YVO4 laser crystals, the passively Q-switched lasers have been successfully developed and provided stable single shortest pulses of 40 ns at the repetition rate of 18.5 kHz, the maximal average output power of 180 mW was achieved corresponding to the optical efficiency of 9% and the slope efficiency of 16%. The dependences of average output power, repetition rate, pulse width and peak power on pump diode power for different transmissions of output mirror are also investigated.

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