Tunable passively <italic>Q</italic>-switched ytterbium-doped fiber laser with mechanically exfoliated GaSe saturable absorber

Fig. 1. Material characterization of mechanically exfoliated GaSe SA. (a) Raman spectrum, (b) nonlinear optical profile, (c) FESEM image, and (d) EDX analysis.

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Fig. 2. Cavity configuration of a Q-switched YDFL.

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Fig. 3. Typical characteristics of a Q-switched YDFL at pump power of 261 mW. (a) Pulse train, (b) single pulse profile, and (c) RF spectrum of fundamental frequency at 92.6 kHz.

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Fig. 4. Variation of Q-switched pulse parameters (a) repetition rate and pulse width, and (b) output power and pulse energy against pump power.

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Fig. 5. Q-switched output spectra at different wavelengths, covering a tuning range of 40 nm (1042–1082 nm).

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Table 1. Comparison of Q-switched YDFL Utilizing Different SAs.

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Table 1. Comparison of Q-switched YDFL Utilizing Different SAs.

SA	Max. Repetition Rate (kHz)	Min. Pulse Width (μs)	Max. Pulse Energy (nJ)	Tuning Range (nm)	Reference
ZnO	50	1.6	2.8	-	[36]
${WS}_{2}$	36.7	3.2	13.6	-	[5]
${MoS}_{2}$	74	2.8	122	40	[35]
${Bi}_{2} {Se}_{3}$	29.1	1.9	17.9	-	[37]
BP	44.8	4	7.1	-	[38]
GaSe	92.6	2.3	18.8	40	This work

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H. Ahmad, S. N. Aidit, S. I. Ooi, Z. C. Tiu, "Tunable passively Q-switched ytterbium-doped fiber laser with mechanically exfoliated GaSe saturable absorber," Chin. Opt. Lett. 16, 020014 (2018)

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Paper Information

Special Issue: PHOTONICS BASED ON 2D NONCARBON MATERIALS

Received: Oct. 17, 2017

Accepted: Nov. 16, 2017

Published Online: Jul. 16, 2018

The Author Email: H. Ahmad (harith@um.edu.my)

DOI:10.3788/COL201816.020014

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology