Passively Q-switched Nd:YVO4 waveguide laser using graphene as a saturable absorber

He, Rong; Aldana, Javier R. Vázquez de; Chen, Feng

doi:10.1016/j.optmat.2015.05.001

Cited by 12 publications

(6 citation statements)

References 37 publications

(53 reference statements)

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“…Recent researches and applications have demonstrated the passively Q-Switching (QS) technique as an effective method to generate pulses, thus considerable efforts on the passively QS technique have been explored by scientists. Among these efforts, different materials serving as saturable absorbers (SA) have been adopted in cavities, realizing nanosecond lasers with MHz-repetition-rate [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Nanosecond Self-Q-Switching Nd:Luag Laser With High Repetition Rate

Zhang

Liu

et al. 2021

IEEE Photonics J.

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Numerical and experimental studies were investigated for the self-Q-switching Nd:LuAG laser which was achieved by the Kerr lens effect. By applying two output couplers of 6% and 1.4%, the shortest pulses of 193.4 ns and 5.1 ns were generated respectively while the corresponding repetition rates were 1.175 MHz and 96.15 MHz respectively. Related to the average powers of 3.34 W and 2.56 W, the system demonstrated the optical to optical efficiency of 21.87% and 21.1% for coupler of 6% and 1.4% respectively. The short pulses with the high repetition rates can be applied in many fields which demonstrate the high value of the research on this self-Qswitching laser.

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Section: Introductionmentioning

confidence: 99%

Nanosecond Self-Q-Switching Nd:Luag Laser With High Repetition Rate

Zhang

Liu

et al. 2021

IEEE Photonics J.

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“…TMDCs exhibit strong light-matter interaction and ultrafast nonlinear absorption, which enable them as promising candidates for photonic applications [24]. To date, both graphene and WS 2 have been applied as suitable SA materials in Q-switched laser systems of waveguides [25,26] and other platforms [27,28]. In addition to the modification techniques implemented to equip desired functionalities of 2D materials [29][30][31][32], the ability to create heterostructures have opened up new possibilities for new physics and unique functionalities by combining distinct 2D materials with diverse properties into van der Waals heterostructures [33].…”

Section: Introductionmentioning

confidence: 99%

Q-switching of waveguide lasers based on graphene/WS_2 van der Waals heterostructure

Cheng

Dong

et al. 2017

Photon. Res.

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We report on the operation of passively Q-switched waveguide lasers at 1 μm wavelength based on a graphene∕WS 2 heterostructure as a saturable absorber (SA). The gain medium is a crystalline Nd:YVO 4 cladding waveguide produced by femtosecond laser writing. The nanosecond waveguide laser operation at 1064 nm has been realized with the maximum average output power of 275 mW and slope efficiency of 37%. In comparison with the systems based on single WS 2 or graphene SA, the lasing Q-switched by a graphene∕WS 2 heterostructure SA possesses advantages of a higher pulse energy and enhanced slope efficiency, indicating the promising applications of van der Waals heterostructures for ultrafast photonic devices.

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“…Graphene was considered for the Q-switch in such waveguides also. Thus, a multi-line type waveguide inscribed in Nd:YVO 4 was Q-switched with graphene SA coated on a quartz plate [ 20 ]. A monolayer of graphene was coated for Q-switch operation on the exit surface of a two-track Yb:YAG waveguide [ 21 ] and a circular depressed-cladding waveguide inscribed in Ho:YAG was operated at 2.1 μm in Q-switch mode-locking regime with a graphene based saturable output coupler [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Passive Q-Switching by Cr4+:YAG Saturable Absorber of Buried Depressed-Cladding Waveguides Obtained in Nd-Doped Media by Femtosecond Laser Beam Writing

Gabriela

Pavel

2018

Materials

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We report on laser performances obtained in Q-switch mode operation from buried depressed-cladding waveguides of circular shape (100 μm diameter) that were inscribed in Nd:YAG and Nd:YVO4 media by direct writing with a femtosecond laser beam. The Q-switch operation was realized with a Cr4+:YAG saturable absorber, aiming to obtain laser pulses of moderate (few μJ) energy at high (tens to hundreds kHz) repetition rate. An average power of 0.52 W at 1.06 μm consisting of a train of pulses of 7.79 μJ energy at 67 kHz repetition rate, was obtained from a waveguide realized in a 4.8 mm long, 1.1-at % Nd:YAG ceramics; the pulse peak power reached 1.95 kW. A similar waveguide that was inscribed in a 3.4 mm long, 1.0-at % Nd:YVO4 crystal yielded laser pulses with 9.4 μJ energy at 83 kHz repetition rate (at 0.77 W average power) and 1.36 kW peak power. The laser performances obtained in continuous-wave operation were discussed for each waveguide used in the experiments. Thus, a continuous-wave output power of 1.45 W was obtained from the circular buried depressed-cladding waveguide inscribed in the 1.1-at %, 4.8 mm long Nd:YAG; the overall optical-to-optical efficiency, with respect to the absorbed pump power, was 0.21. The waveguide inscribed in the 1.0-at %, 3.4 mm long Nd:YVO4 crystal yielded 1.85 W power at 0.26 overall optical efficiency. This work shows the possibility to build compact laser systems with average-to-high peak power pulses based on waveguides realized by a femtosecond (fs) laser beam direct writing technique and that are pumped by a fiber-coupled diode laser.

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Passively Q-switched Nd:YVO4 waveguide laser using graphene as a saturable absorber

Cited by 12 publications

References 37 publications

Nanosecond Self-Q-Switching Nd:Luag Laser With High Repetition Rate

Nanosecond Self-Q-Switching Nd:Luag Laser With High Repetition Rate

Q-switching of waveguide lasers based on graphene/WS_2 van der Waals heterostructure

Passive Q-Switching by Cr4+:YAG Saturable Absorber of Buried Depressed-Cladding Waveguides Obtained in Nd-Doped Media by Femtosecond Laser Beam Writing

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