<italic>Q</italic>-switched fiber laser operating at 1.5  μm based on WTe<sub>2</sub>

Mengli Liu; Yuyi Ouyang; Huanran Hou; Wenjun Liu; Zhiyi Wei

doi:10.3788/COL201917.020006

Chinese Optics Letters, Volume. 17, Issue 2, 020006(2019)

Q-switched fiber laser operating at 1.5 μm based on WTe₂

Mengli Liu¹, Yuyi Ouyang¹, Huanran Hou¹, Wenjun Liu^1、*, and Zhiyi Wei^2、**

¹State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China

²Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

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Figures & Tables(6)

Fig. 1. SEM images of (a) the WTe2 particles on the surface, and (b) the thickness of the WTe2.

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Fig. 2. (a) Raman spectrum of prepared WTe2, and (b) the nonlinear absorption characteristics of the WTe2 SA.

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Fig. 3. Experimental installation diagram of the proposed Q-switched EDF laser employing a taper fiber WTe2 SA.

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Fig. 4. (a) Spectrum, (b) pulse duration, (c) oscilloscope traces under various pump powers, and (d) RF spectrum.

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Fig. 5. (a) Trend curves of pulse duration and repetition rate with power variation, and (b) trend curves of average output power and pulse energy with power variation.

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Table 1. Performance Summary of Passively Q-switched Laser Systems Employing Different SAs

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Table 1. Performance Summary of Passively Q-switched Laser Systems Employing Different SAs

Meterials	Modulation Depth (%)	Wavelength (nm)	$Q$ -switching Threshold (mW)	Repetition Rate (kHz)	Pulse Duration (μs)	Power (mW)	SNR (dB)	Energy (nJ)	Ref.
Graphene	1.5	0.02/1539.6	8.3	10.36–41.8	3.89	3.38	30	28.7	[42]
${Bi}_{2} {Se}_{3}$	30	0.2/1543.2	45	2.6–12	9.5	$< 0.05$	40	4	[43]
${Bi}_{2} {Te}_{3}$	10.8	2/1562.9	67	7.5–42.8	2.81	0.55	--	12.7	[44]
BP	18.55	0.2/1562.87	50	6.983–15.78	13.2	$< 1.5$	45	94.3	[45]
${WS}_{2}$	0.99	--/1560.7	40	27.2–84.8	1.73	$\sim 0.3$	43.7	$\sim 11$	[46]
${MoS}_{2}$	1.6	0.16/1565	15.5	6.5–27	7.5	1.7	54.5	63.2	[26]
${WSe}_{2}$	3.5	--/1560	140	4.5–49.6	3.9	1.23	46.7	17	[47]
${MoSe}_{2}$	4.7	--/1566	--	26.5–35.4	5.65	24.5	--	825	[48]
${WTe}_{2}$	31.06	3.82/1531	212	144.7–240	0.583	14.07	55	58.625	This work

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Mengli Liu, Yuyi Ouyang, Huanran Hou, Wenjun Liu, Zhiyi Wei. Q-switched fiber laser operating at 1.5 μm based on WTe₂[J]. Chinese Optics Letters, 2019, 17(2): 020006

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Paper Information

Special Issue: EXTRAORDINARY 2D MATERIALS BASED NANOPHOTONICS

Received: Oct. 31, 2018

Accepted: Dec. 14, 2018

Published Online: Feb. 14, 2019

The Author Email: Wenjun Liu (jungliu@bupt.edu.cn), Zhiyi Wei (zywei@iphy.ac.cn)

DOI:10.3788/COL201917.020006

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology