High power, widely tunable dual-wavelength 2 <i>μ</i>m laser based on intracavity KTP optical parametric oscillator

Yan, Dexian; Wang, Yuye; Xu, Degang; Shi, Wei; Zhong, Kai; Liu, Pengxiang; Yan, Chao; Mei, Jialin; Shi, Jia; Yao, Jianquan

doi:10.1088/1361-6463/aa4f47

Cited by 4 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The experimental setup is shown in figure 1. The experimental scheme of the dualwavelength 2 µm pump source is similar to our previous work and described in detail in [11,12]. A dichroic mirror coated for high reflection at 1.06 µm and antireflection at 1.9-2.5 µm is used to filter out the fundamental laser.…”

Section: Experiments and Setupmentioning

confidence: 99%

High-repetition-rate, tunable and coherent mid-infrared source based on difference frequency generation from a dual-wavelength 2 µm laser and GaSe crystal

Yan¹,

Xu²,

Wang³

et al. 2018

Laser Phys.

View full text Add to dashboard Cite

Although high-repetition-rate dual-wavelength 2 µm KTP optical parametric oscillators (OPOs) have been realized for quite a long time, we have treated one in generating coherent mid-infrared waves in this paper for the first time. The dual-wavelength 2 µm laser is generated from a KTP OPO intracavity, pumped by an acousto-optically Q-switched side-pumped Nd:YAG laser. Treating an 8 mm long GaSe crystal for difference frequency generation (DFG), a maximum average output power of 360 µW is obtained at a pulserepetition rate of 10 kHz at the wavelength of 9.6 µm for type-I phase matching DFG. The peak power amounts to 3.3 W and the conversion efficiency is 0.12%. The continuously tunable and coherent radiation in the mid-infrared range of 9-16 µm has been achieved. Moreover, type-II phase matching DFG with an output wavelength continuously tunable in the range of 9-13.7 µm has also been achieved. The output mid-infrared power scaling is still feasible with a higher pump power and a nonlinear DFG crystal with a higher damage threshold.

show abstract

Section: Experiments and Setupmentioning

confidence: 99%

High-repetition-rate, tunable and coherent mid-infrared source based on difference frequency generation from a dual-wavelength 2 µm laser and GaSe crystal

Yan¹,

Xu²,

Wang³

et al. 2018

Laser Phys.

View full text Add to dashboard Cite

show abstract

“…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]. Laser sources at ~2 μm and beyond are also necessary for pumping long-wave mid-infrared (mid-IR) OPOs and DFG sources based on non-oxide nonlinear materials such as ZnGeP2, AgGaS2, AgGaSe2 and quasi-phase-matched orientationpatterned gallium arsenide (OP-GaAs) [12,[14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

View full text Add to dashboard Cite

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.

show abstract

Compact, efficient and widely tunable 2-μm high-repetition-rate optical parametric oscillators

Mei

Zhong

Liu

et al. 2018

Optics Communications

View full text Add to dashboard Cite

High power, widely tunable dual-wavelength 2 μm laser based on intracavity KTP optical parametric oscillator

Cited by 4 publications

References 14 publications

High-repetition-rate, tunable and coherent mid-infrared source based on difference frequency generation from a dual-wavelength 2 µm laser and GaSe crystal

High-repetition-rate, tunable and coherent mid-infrared source based on difference frequency generation from a dual-wavelength 2 µm laser and GaSe crystal

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

Compact, efficient and widely tunable 2-μm high-repetition-rate optical parametric oscillators

Contact Info

Product

Resources

About