High-average-power, high-repetition-rate tunable terahertz difference frequency generation with GaSe crystal pumped by 2  μm dual-wavelength intracavity KTP optical parametric oscillator

Yan, Dexian; Wang, Yuye; Xu, Degang; Liu, Pengxiang; Yan, Chao; Shi, Jia; Liu, Hongxiang; He, Yixin; Tang, Longhuang; Jin, Feng; Guo, Jun; Shi, Wei; Zhong, Kai; Tsang, Yuen Hong; Yao, Jianquan

doi:10.1364/prj.5.000082

Cited by 55 publications

(24 citation statements)

References 19 publications

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“…1a) and periodic/aperiodic poled ferroelectric domains 4,5 (+P and −P) ( Fig. 1b) in certain nonlinear crystals [6][7][8] , coherent generation ranging from the visible region to the terahertz region has been developed and utilized in classical and quantum regions [9][10][11] . However, most nonlinear optical crystals have neither sufficient birefringence nor controllable ferroelectric domains.…”

Section: Dear Editormentioning

confidence: 99%

Pushing periodic-disorder-induced phase matching into the deep-ultraviolet spectral region: theory and demonstration

Shao

Liang

et al. 2020

Light Sci Appl

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Nonlinear frequency conversion is a ubiquitous technique that is used to obtain broad-range lasers and supercontinuum coherent sources. The phase-matching condition (momentum conservation relation) is the key criterion but a challenging bottleneck in highly efficient conversion. Birefringent phase matching (BPM) and quasiphase matching (QPM) are two feasible routes but are strongly limited in natural anisotropic crystals or ferroelectric crystals. Therefore, it is in urgent demand for a general technique that can compensate for the phase mismatching in universal nonlinear materials and in broad wavelength ranges. Here, an additional periodic phase (APP) from order/ disorder alignment is proposed to meet the phase-matching condition in arbitrary nonlinear crystals and demonstrated from the visible region to the deep-ultraviolet region (e.g., LiNbO 3 and quartz). Remarkably, pioneering 177.3-nm coherent output is first obtained in commercial quartz crystal with an unprecedented conversion efficiency above 1‰. This study not only opens a new roadmap to resuscitate those long-neglected nonlinear optical crystals for wavelength extension, but also may revolutionize next-generation nonlinear photonics and their further applications.

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Section: Dear Editormentioning

confidence: 99%

Pushing periodic-disorder-induced phase matching into the deep-ultraviolet spectral region: theory and demonstration

Shao

Liang

et al. 2020

Light Sci Appl

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“…In addition, the nonlinear frequency conversion technology, such as optical parametric oscillator (OPO) and stimulated Raman scattering (SRS), is another effective approach to extend the available spectral range of the orthogonally polarized dual-wavelength laser. By virtue of the dual-wavelength OPO technique, researchers have obtained the simultaneous orthogonally polarized dual-wavelength laser output at 1.5 and 2.0 μm [14], [15]. But OPO requires phase-matching and working near damage threshold for many nonlinear optical crystals, which make the system unstable and inconvenient [16].…”

Section: Introductionmentioning

confidence: 99%

Multi-Watt Simultaneous Orthogonally Polarized Dual-Wavelength Pulse Generation of an Intracavity Nd:YLF/YVO₄ Raman Laser

Zuo¹,

Dai²,

Yin³

et al. 2019

IEEE Photonics J.

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We present the first demonstration of an actively Q-switched orthogonally polarized dual-wavelength Nd:YLF/YVO 4 Raman laser to our knowledge. The gain competition of the orthogonally polarized dual-wavelength fundamental laser at 1047 and 1053 nm was ultimately avoided by incorporating two Nd:YLF crystals into two laser resonators. By adjusting the gain or loss difference of two resonators, the pulse synchronization of the orthogonally polarized dual-wavelength Raman laser was realized. Benefitting from the efficient thermal stress and energy-transfer upconversion management of Nd:YLF crystal, a maximum dualwavelength Raman output power of 4.5 W was obtained with M 2 < 1.8, which contained a 2.5 W Raman component at 1155 nm and a 2.0 W Raman component at 1162 nm, under the incident pump power of 46.1 W and pulse repetition frequency of 5 kHz. The corresponding peak powers were as high as 178.6 and 142.9 kW, respectively. As far as we know, we have increased the orthogonally polarized dual-wavelength Raman average output power by six times.

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“…The spectral region near 2 μm is well known for the high absorption by water and shallow penetration depth of ~0.4 nm, which is useful for various clinical applications [1]. Tunable sources near 2 μm are also of interest due to their utility in applications such as speckle-imaging [2][3], eye-safe differential absorption lidar [4][5], range finding [6], coherent Doppler wind lidar [7], and terahertz (THz) difference-frequency-generation (DFG) [8]. Wavelength generation in the 2-μm region has been achieved using Ho 3+ -doped, Tm 3+ -doped, or Tm 3+ :Ho 3+ co-doped fiber lasers [9][10], mode-locked Tm:CaYAlO4 (Tm:CYA) laser [11], near-degenerate optical parametric oscillators (OPOs) [12], and, more recently, intracavity OPOs in two-crystal walkoff compensation scheme [13].…”

Section: Introductionmentioning

confidence: 99%

Tunable high-average-power optical parametric oscillators near 2 μm

et al. 2018

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We report on the development of high-average-power nanosecond and picosecond laser sources tunable near 2 m based on optical parametric oscillators (OPOs) pumped by solid-state Nd:YAG and Yb-fiber lasers at 1.064 m. By exploiting a 50-mm-long MgO-doped lithium niobate (MgO:PPLN) as the nonlinear crystal and operating the OPO in near-degenerate doubly-resonant configuration with intracavity wavelength selection elements, we have generated tunable high-average-power radiation across 1880-2451 nm in high spectral and spatial beam quality with excellent output stability. In nanosecond operation, pumping with a Q-switched Nd:YAG laser and using an intracavity prism for spectral control, we have generated more than 2 W of average power in pulses of 10 ns duration at 80 kHz repetition rate in narrow linewidth (<3 nm), with M 2 <2.8, and a passive power stability better than 2.2% rms over 1 hour. In picosecond operation, pumping with a mode-locked Yb-fiber laser and using a diffraction grating as the wavelength selection element, we have generated more than 5 W of average power in pulses of 20 ps at 80 MHz repetition rate in narrow bandwidth (~2.5 nm), with M 2 <1.8 and a passive power stability better than 1.3% rms over 2 hours. The demonstrated sources represent viable alternatives to Tm 3+ /Ho 3+ -doped solid-state and fiber lasers for the generation of high-power radiation in the ~2 m spectral range.

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High-average-power, high-repetition-rate tunable terahertz difference frequency generation with GaSe crystal pumped by 2 μm dual-wavelength intracavity KTP optical parametric oscillator

Cited by 55 publications

References 19 publications

Pushing periodic-disorder-induced phase matching into the deep-ultraviolet spectral region: theory and demonstration

Pushing periodic-disorder-induced phase matching into the deep-ultraviolet spectral region: theory and demonstration

Multi-Watt Simultaneous Orthogonally Polarized Dual-Wavelength Pulse Generation of an Intracavity Nd:YLF/YVO₄ Raman Laser

Tunable high-average-power optical parametric oscillators near 2 μm

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High-average-power, high-repetition-rate tunable terahertz difference frequency generation with GaSe crystal pumped by 2 μm dual-wavelength intracavity KTP optical parametric oscillator

Cited by 55 publications

References 19 publications

Pushing periodic-disorder-induced phase matching into the deep-ultraviolet spectral region: theory and demonstration

Pushing periodic-disorder-induced phase matching into the deep-ultraviolet spectral region: theory and demonstration

Multi-Watt Simultaneous Orthogonally Polarized Dual-Wavelength Pulse Generation of an Intracavity Nd:YLF/YVO4 Raman Laser

Tunable high-average-power optical parametric oscillators near 2 μm

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Product

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Multi-Watt Simultaneous Orthogonally Polarized Dual-Wavelength Pulse Generation of an Intracavity Nd:YLF/YVO₄ Raman Laser