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

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

doi:10.1364/PRJ.5.000082

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

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

Research output: Journal article publication › Journal article › Academic research › peer-review

48 Citations (Scopus)

Abstract

We have demonstrated a high-average-power, high-repetition-rate optical terahertz (THz) source based on difference frequency generation (DFG) in the GaSe crystal by using a near-degenerate 2 μm intracavity KTP optical parametric oscillator as the pump source. The power of the 2 μm dual-wavelength laser was up to 12.33 W with continuous tuning ranges of 1988.0–2196.2 nm/2278.4–2065.6 nm for two waves. Different GaSe cystal lengths have been experimentally investigated for the DFG THz source in order to optimize the THz output power, which was in good agreement with the theoretical analysis. Based on an 8 mm long GaSe crystal, the THz wave was continuously tuned from 0.21 to 3 THz. The maximum THz average power of 1.66 μW was obtained at repetition rate of 10 kHz under 1.48 THz. The single pulse energy amounted to 166 pJ and the conversion efficiency from 2 μm laser to THz output was 1.68 × 10−6. The signal-to-noise ratio of the detected THz voltage was 23 dB. The acceptance angle of DFG in the GaSe crystal was measured to be 0.16°.

Original language	English
Pages (from-to)	82-87
Number of pages	6
Journal	Photonics Research
Volume	5
Issue number	2
DOIs	https://doi.org/10.1364/PRJ.5.000082
Publication status	Published - 1 Apr 2017

Keywords

Infrared and far-infrared lasers
Infrared, far
Nonlinear optics, parametric processes
Nonlinear wave mixing

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics

More information

10.1364/PRJ.5.000082

Cite this

Yan, D., Wang, Y., Xu, D., Liu, P., Yan, C., Shi, J., Liu, H., He, Y., Tang, L., Feng, J., Guo, J., Shi, W., Zhong, K., Tsang, Y. H., & Yao, J. (2017). 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. Photonics Research, 5(2), 82-87. https://doi.org/10.1364/PRJ.5.000082

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title = "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",

abstract = "We have demonstrated a high-average-power, high-repetition-rate optical terahertz (THz) source based on difference frequency generation (DFG) in the GaSe crystal by using a near-degenerate 2 μm intracavity KTP optical parametric oscillator as the pump source. The power of the 2 μm dual-wavelength laser was up to 12.33 W with continuous tuning ranges of 1988.0–2196.2 nm/2278.4–2065.6 nm for two waves. Different GaSe cystal lengths have been experimentally investigated for the DFG THz source in order to optimize the THz output power, which was in good agreement with the theoretical analysis. Based on an 8 mm long GaSe crystal, the THz wave was continuously tuned from 0.21 to 3 THz. The maximum THz average power of 1.66 μW was obtained at repetition rate of 10 kHz under 1.48 THz. The single pulse energy amounted to 166 pJ and the conversion efficiency from 2 μm laser to THz output was 1.68 × 10−6. The signal-to-noise ratio of the detected THz voltage was 23 dB. The acceptance angle of DFG in the GaSe crystal was measured to be 0.16°.",

keywords = "Infrared and far-infrared lasers, Infrared, far, Nonlinear optics, parametric processes, Nonlinear wave mixing",

author = "Dexian Yan and Yuye Wang and Degang Xu and Pengxiang Liu and Chao Yan and Jia Shi and Hongxiang Liu and Yixin He and Longhuang Tang and Jianchen Feng and Jianqin Guo and Wei Shi and Kai Zhong and Tsang, {Yuen Hong} and Jianquan Yao",

year = "2017",

month = apr,

day = "1",

doi = "10.1364/PRJ.5.000082",

language = "English",

volume = "5",

pages = "82--87",

journal = "Photonics Research",

issn = "2327-9125",

publisher = "OSA Publishing",

number = "2",

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Yan, D, Wang, Y, Xu, D, Liu, P, Yan, C, Shi, J, Liu, H, He, Y, Tang, L, Feng, J, Guo, J, Shi, W, Zhong, K, Tsang, YH & Yao, J 2017, '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', Photonics Research, vol. 5, no. 2, pp. 82-87. https://doi.org/10.1364/PRJ.5.000082

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 et al.
In: Photonics Research, Vol. 5, No. 2, 01.04.2017, p. 82-87.

Research output: Journal article publication › Journal article › Academic research › peer-review

TY - JOUR

T1 - 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

AU - Yan, Dexian

AU - Wang, Yuye

AU - Xu, Degang

AU - Liu, Pengxiang

AU - Yan, Chao

AU - Shi, Jia

AU - Liu, Hongxiang

AU - He, Yixin

AU - Tang, Longhuang

AU - Feng, Jianchen

AU - Guo, Jianqin

AU - Shi, Wei

AU - Zhong, Kai

AU - Tsang, Yuen Hong

AU - Yao, Jianquan

PY - 2017/4/1

Y1 - 2017/4/1

N2 - We have demonstrated a high-average-power, high-repetition-rate optical terahertz (THz) source based on difference frequency generation (DFG) in the GaSe crystal by using a near-degenerate 2 μm intracavity KTP optical parametric oscillator as the pump source. The power of the 2 μm dual-wavelength laser was up to 12.33 W with continuous tuning ranges of 1988.0–2196.2 nm/2278.4–2065.6 nm for two waves. Different GaSe cystal lengths have been experimentally investigated for the DFG THz source in order to optimize the THz output power, which was in good agreement with the theoretical analysis. Based on an 8 mm long GaSe crystal, the THz wave was continuously tuned from 0.21 to 3 THz. The maximum THz average power of 1.66 μW was obtained at repetition rate of 10 kHz under 1.48 THz. The single pulse energy amounted to 166 pJ and the conversion efficiency from 2 μm laser to THz output was 1.68 × 10−6. The signal-to-noise ratio of the detected THz voltage was 23 dB. The acceptance angle of DFG in the GaSe crystal was measured to be 0.16°.

AB - We have demonstrated a high-average-power, high-repetition-rate optical terahertz (THz) source based on difference frequency generation (DFG) in the GaSe crystal by using a near-degenerate 2 μm intracavity KTP optical parametric oscillator as the pump source. The power of the 2 μm dual-wavelength laser was up to 12.33 W with continuous tuning ranges of 1988.0–2196.2 nm/2278.4–2065.6 nm for two waves. Different GaSe cystal lengths have been experimentally investigated for the DFG THz source in order to optimize the THz output power, which was in good agreement with the theoretical analysis. Based on an 8 mm long GaSe crystal, the THz wave was continuously tuned from 0.21 to 3 THz. The maximum THz average power of 1.66 μW was obtained at repetition rate of 10 kHz under 1.48 THz. The single pulse energy amounted to 166 pJ and the conversion efficiency from 2 μm laser to THz output was 1.68 × 10−6. The signal-to-noise ratio of the detected THz voltage was 23 dB. The acceptance angle of DFG in the GaSe crystal was measured to be 0.16°.

KW - Infrared and far-infrared lasers

KW - Infrared, far

KW - Nonlinear optics, parametric processes

KW - Nonlinear wave mixing

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U2 - 10.1364/PRJ.5.000082

DO - 10.1364/PRJ.5.000082

M3 - Journal article

SN - 2327-9125

VL - 5

SP - 82

EP - 87

JO - Photonics Research

JF - Photonics Research

IS - 2

ER -

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

Abstract

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