Enhancement of terahertz wave difference frequency generation based on a compact walk-off compensated KTP OPO

Zhong, Kai; Yao, Jianquan; Xu, Degang; Wang, Zhuo; Li, Zhongyang; Zhang, Huiyun; Wang, Peng

doi:10.1016/j.optcom.2010.04.106

Cited by 29 publications

(7 citation statements)

References 13 publications

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“…Recently, we proposed a flexible method to adjust the time interval and power ratio of dual-wavelength laser for THz generation based on the end-pumping configuration with two coaxially arranged Nd:YLF crystals [30], as shown in Figure 3, which could solve the problem of the timing jitter. Moreover, a tunable 2 µm optical parametric oscillator (OPO) for generating THz waves with a GaSe crystal was also investigated [31,32]. Degenerate 2 µm lasers with a short pulse duration are good for enhancing the DFG efficiency, as they are efficient, simple, and widely tunable.…”

Section: Dfg Terahertz Sources With Inorganic Crystalsmentioning

confidence: 99%

Optical Terahertz Sources Based on Difference Frequency Generation in Nonlinear Crystals

et al. 2022

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Terahertz (THz) sources, ranging from 0.1 THz to 10 THz, between microwaves and infrared waves, have important applications in spectral detection, medical imaging, communication, etc. Difference frequency generation (DFG) is an effective method for generating terahertz with the characteristics of low cost, simple structure, widely tunable range, no threshold, and room-temperature operation. This paper reviews various optical terahertz sources of difference frequency generation based on nonlinear crystals, including DFG with inorganic crystals, DFG with organic crystals, DFG with quasi-phase-matching (QPM) crystals, DFG in waveguides, cavity-enhanced DFG, and cascaded DFG. Their recent advances, as well as their advantages and disadvantages, are fully present and discussed. This review is expected to provide a comprehensive reference for researchers in this field and a quick understanding of optical THz sources of difference frequency generation with nonlinear crystals.

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Section: Dfg Terahertz Sources With Inorganic Crystalsmentioning

confidence: 99%

Optical Terahertz Sources Based on Difference Frequency Generation in Nonlinear Crystals

et al. 2022

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“…Multi-wavelength lasers with simultaneous emissions of two or more lasers in one beam have great applications in the field of tera hertz (THz), precision metrology, holography, medical treatment, and laser interferometry . Most of the multi-wavelength lasers are produced by Nd 3+ -doped crystals, such as Nd 3+ -doped yttrium aluminum garnet (YAG:Nd 3+ ), yttrium vanadate (YVO 4 :Nd 3+ ), gadolinium vanadate (GdVO 4 :Nd 3+ ), and yttrium-aluminate (YAP:Nd 3+ ) crystals since the optical emission of Nd 3+ corresponding to the 4 F 3/2 → 4 I 11/2 transition can split into several peaks around 1064 nm according to the Stark sublevels of 4 I 11/2 .…”

Section: Introductionmentioning

confidence: 99%

Triple-Wavelength Lasing with a Stabilized β-LaBSiO₅:Nd³⁺ Crystal

Huang

Shi

et al. 2022

J. Am. Chem. Soc.

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Multi-wavelength lasers, especially the triple-wavelength laser around 1060 nm, could be produced by the 4F3/2 → 4I11/2 transition of Nd3+ and present numerous challenges and opportunities in the field of optoelectronics. The Nd3+-doped high-temperature phase of LaBSiO5 (β-LBSO) is an ideal crystal to produce triple-wavelength lasers; however, the crystal growth is challenging because of the phase transition from β-LBSO to low-temperature phase (α-LBSO) at 162 °C. This phase transition is successfully suppressed when the doping content of Nd3+ is larger than 6.3 at. %, and the Nd3+-doped β-LBSO is stable at room temperature. The local disorder of BO4 tetrahedra due to Nd3+ doping is essential to the stabilization of β-LBSO. For the first time, the β-LBSO:8%Nd3+ crystal with a dimension of 1.8 × 1.8 × 1.8 cm3 is obtained through the top-seeded solution method. The crystal shows strong optical absorption in the range of 785–815 nm, matching well with the commercial laser diode pumping source. The optical emission of 4F3/2 → 4I11/2 splits into four peaks with the highest optical emission cross section of 2.14 × 10–20 cm2 at 1068 nm. The continuous-wave triple-wavelength generation of coherent light at 1047, 1071, and 1092 nm is achieved with the highest output power of 235 mW and efficiency of 12.1%.

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“…Dual-wavelength mid-infrared OPOs can simultaneously generate mid-infrared emission with different wavelengths, which have great application value and prospects in THz generation, remote sensing and material detection [1]- [4]. Researchers have developed two major schemes to achieve dual-wavelength mid-infrared OPOs.…”

Section: Introductionmentioning

confidence: 99%

A High Efficient Dual-Wavelength Mid-Infrared Optical Parametric Oscillator Pumped by the Raman Fiber Oscillator

et al. 2020

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In this paper, a novel high efficient dual-wavelength mid-infrared optical parametric oscillator (OPO) was demonstrated, which was pumped by a dual-wavelength Raman fiber oscillator for the first time. The adoption of oscillator structure reduced the waste of power, increased Raman pump power and promoted its frequency conversion. The dualwavelength pump source was fixed at 1070 nm and 1120 nm and the Raman conversion efficiency was greatly enhanced from 26.7% to 72.1%. The high Raman efficiency and low Raman threshold enabled the Raman laser to build optical parametric oscillation easily and the pump-to-idler conversion efficiency of Raman laser improved greatly from 4.2% to 13.3%. The generated dual-wavelength mid-infrared laser was fixed at 3272 nm and 3663 nm, with a maximum power of 6.87 W, indicating a 13.9% pump-to-idler conversion efficiency. The highest mid-infrared output power generated by optical parametric oscillation of Raman laser was also achieved, which is almost ten times than before.

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Enhancement of terahertz wave difference frequency generation based on a compact walk-off compensated KTP OPO

Cited by 29 publications

References 13 publications

Optical Terahertz Sources Based on Difference Frequency Generation in Nonlinear Crystals

Optical Terahertz Sources Based on Difference Frequency Generation in Nonlinear Crystals

Triple-Wavelength Lasing with a Stabilized β-LaBSiO₅:Nd³⁺ Crystal

A High Efficient Dual-Wavelength Mid-Infrared Optical Parametric Oscillator Pumped by the Raman Fiber Oscillator

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Enhancement of terahertz wave difference frequency generation based on a compact walk-off compensated KTP OPO

Cited by 29 publications

References 13 publications

Optical Terahertz Sources Based on Difference Frequency Generation in Nonlinear Crystals

Optical Terahertz Sources Based on Difference Frequency Generation in Nonlinear Crystals

Triple-Wavelength Lasing with a Stabilized β-LaBSiO5:Nd3+ Crystal

A High Efficient Dual-Wavelength Mid-Infrared Optical Parametric Oscillator Pumped by the Raman Fiber Oscillator

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Triple-Wavelength Lasing with a Stabilized β-LaBSiO₅:Nd³⁺ Crystal