Broad expansion of optical frequency combs by self-Raman scattering in coupled-cavity self-mode-locked monolithic lasers

Chang, M. T.; Huang, Ting-Hsuan; Liang, H. C.; Su, Kuan-Wei; Chen, Yung-Fu

doi:10.1364/oe.25.007627

Cited by 5 publications

(2 citation statements)

References 36 publications

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“…The Raman transitions typically exhibit a linewidth broadening, which can be effectively characterized using a Lorentzian profile. Consequently, the stimulated Raman gain profile can be expressed as [28],…”

Section: Effect Of Raman Crystal Length On Performance Of Self-pulsed...mentioning

confidence: 99%

Sub-megahertz compact self-pulsed Raman laser

Sun,

Liu,

Zhang

et al. 2024

Phys. Scr.

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Broadband self-pulsed Raman laser operating at sub-megahertz (sub-MHz) has been widely used in optical sensing, high-spectral-resolution lidar, frequency-division multiplexing, and optical communication. However, it is a big challenge for achieving stable self-pulsed Raman laser oscillation in a wide pump power range. Here, we construct a compact Yb:YAG/YVO4 Raman laser for generating broadband self-pulsed laser operating at high repetition rate. The effects of cavity length (LC) and Raman crystal length (LR) on the performance of self-pulsed Raman laser have been investigated. By utilizing a 1.5-mm-thick YVO4 crystal as a Raman crystal, the repetition rate increases dramatically from 62 to 280 kHz when the LC decreases from 10 to 4 mm. Meanwhile, the pulse width of 0.66 μs and peak power of 1.1 W is achieved for the self-pulsed Raman laser with LC = 4 mm. For the 4-mm-long Raman laser cavity constructed with a 2-mm-thick YVO4 crystal, the pump power range enable for self-pulsed Raman laser oscillation extends from 1.8 to 3.9 W, the repetition rate has been further increased from 258 to 467 kHz. While the peak power and pulse width are 0.6 W and 0.98 μs, respectively. The Yb:YAG/YVO4 self-pulsed Raman laser oscillates in broadband multi-longitudinal-mode, the spectral bandwidth is 27.4 nm covering from 1051.1 to 1078.5 nm. The utilization of a tilted 2-mm-thick YVO4 crystal as output coupler to construct compact Yb:YAG/YVO4 self-pulsed Raman laser dramatically expands the pump power range for generating high repetition rate self-pulsed Raman laser. Sub-MHz self-pulsed Raman lasers with a wide spectral bandwidth have potential applications in materials processing, quantum information processing, and optical communications.

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Section: Effect Of Raman Crystal Length On Performance Of Self-pulsed...mentioning

confidence: 99%

Sub-megahertz compact self-pulsed Raman laser

Sun,

Liu,

Zhang

et al. 2024

Phys. Scr.

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show abstract

“…[ 24 ] Broadband new wavelength intracavity Raman lasers oscillating in high‐order LG mode converted through SRS effect [ 25 ] provide more flexible routes for high‐spectral‐resolution lidar, [ 26,27 ] femtosecond pulse generation. [ 28 ] Vanadate crystals with high Raman gain is widely used in crystalline Raman laser. [ 29,30 ] High‐order LG 0, n mode vortex lasers have been obtained through astigmatic transformation of Hermite‐Gaussian mode generated in an off‐axis pumping Nd:YVO 4 self‐Raman laser.…”

Section: Introductionmentioning

confidence: 99%

Broadband Petal‐Like Raman Laser

2022

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High-order Laguerre-Gaussian (LG 0,n ) petal-like lasers are extremely important for manipulating microparticles, creating 3D optical trapping structures, and free space optical communication. However, it is difficult to expand the wavelength of LG 0,n petal-like lasers owing to the narrow fluorescence spectrum of laser gain media. Here, a Raman laser constructed with a Yb 3+ :Y 3 Al 5 O 12 (Yb:YAG) crystal and a yttrium vanadate (YVO 4 ) is demonstrated for achieving a high-order LG 0,n petal-like laser with broadband laser wavelength and high beam quality. High-order LG 0,n petal-like lasers with n tunable from 3 to 11 are obtained. The LG 0,11 petal-like Raman laser oscillates from 1075.4 to 1088.7 nm with 44 longitudinal modes, and the bandwidth of the Raman laser is 13.3 nm. The output power of the LG 0,11 petal-like Raman laser is 126 mW with an optical efficiency of 1.5%. High-order LG 0,n petal-like Raman lasers with tunable n provide flexible choices for potential applications in manipulating microparticles and biological molecules.

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Broadband multi-longitudinal-mode Yb:YAG/YVO₄ coupled Raman microchip laser

et al. 2020

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Broadband lasers oscillating in multiple longitudinal modes have potential applications on high resolution interferometer, optical communication and laser spectroscopy. However, the bandwidth of the laser spectrum is limited by the spectral range of laser materials. Here, a broadband multi-longitudinal-mode laser with bandwidth of 22.4 nm at first-order Stokes wavelength has been achieved in a Yb:YAG/YVO4 Raman microchip laser pumped with a quasi-continuous-wave laser-diode. The output energy is 11.6 mJ at pump energy of 34.4 mJ, and the optical efficiency is 34%. Dramatically expanding multi-longitudinal-mode laser spectrum has been achieved by forming Yb:YAG/YVO4 coupled Raman microchip laser with an external Fabry–Perot mirror to manipulate the output coupling losses at different frequencies for fundamental, first-order and second-order Stokes lasers. The bandwidth of the broadband multi-longitudinal-mode laser is 55.4 nm, which covers from 1041 nm to 1096.4 nm and includes 118 longitudinal modes. This enables compact coupled Raman microchip solid-state lasers for generating broadband multi-longitudinal-mode laser.

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Broad expansion of optical frequency combs by self-Raman scattering in coupled-cavity self-mode-locked monolithic lasers

Cited by 5 publications

References 36 publications

Sub-megahertz compact self-pulsed Raman laser

Sub-megahertz compact self-pulsed Raman laser

Broadband Petal‐Like Raman Laser

Broadband multi-longitudinal-mode Yb:YAG/YVO₄ coupled Raman microchip laser

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Broad expansion of optical frequency combs by self-Raman scattering in coupled-cavity self-mode-locked monolithic lasers

Cited by 5 publications

References 36 publications

Sub-megahertz compact self-pulsed Raman laser

Sub-megahertz compact self-pulsed Raman laser

Broadband Petal‐Like Raman Laser

Broadband multi-longitudinal-mode Yb:YAG/YVO4 coupled Raman microchip laser

Contact Info

Product

Resources

About

Broadband multi-longitudinal-mode Yb:YAG/YVO₄ coupled Raman microchip laser