Generation of narrowband terahertz radiation by an ultrashort laser pulse in a bulk LiNbO_3 crystal

Mashkovich, E. A.; Сычугин, С. А.; Бакунов, М. И.

doi:10.1364/josab.34.001805

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…GaAs is an alternative material for THz generation with superior proprieties; 2 μm band powerful lasers (e.g., Tm 3 -doped fiber lasers [21] with the cross-relaxation process and 200% theoretical quantum efficiency) are well suited for the pump of GaAs, due to the low pump absorption (free from the two-photon absorption) and modest coherent length (nearly mm level). The phase mismatch can be compensated with periodically inverted [7] and waveguide structures [22] as well as pump beams with tilted phase front [23,24] or Bessel-type profile [25].…”

Section: Introductionmentioning

confidence: 99%

Low-threshold terahertz-wave generation based on a cavity phase-matched parametric process in a Fabry–Perot microresonator

Liu

Feng

et al. 2017

J. Opt. Soc. Am. B

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A configuration for an optical pumped monochromatic terahertz (THz) source operating in a high repetition rate is developed and based on a resonant parametric process within a Fabry-Perot microcavity. Comprehensive analysis of the spectral selection, cavity phase matching, energy-conversion dynamic, and input-output characteristics is provided. Calculations are performed on a Tm 3 -doped fiber laser pumped GaAs sheet. It is indicated that a pump threshold can be scaled down by injection seeding of the signal wave. Efficient THz wave generation (mW level average power) under relatively low pump peak power (65 kW) is predicted.

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Section: Introductionmentioning

confidence: 99%

Low-threshold terahertz-wave generation based on a cavity phase-matched parametric process in a Fabry–Perot microresonator

Liu

Feng

et al. 2017

J. Opt. Soc. Am. B

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Noncollinear electro-optic sampling detection of terahertz pulses in a LiNbO₃ crystal while avoiding the effect of intrinsic birefringence

Shugurov¹,

Bodrov

Mashkovich³

et al. 2022

Opt. Express

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We propose and experimentally prove efficient high-resolution electro-optic sampling measurement of broadband terahertz waveforms in a LiNbO3 crystal in the configuration with the probe laser beam propagating along the optical axis of the crystal. This configuration allows one to avoid the detrimental effect of strong intrinsic birefringence of LiNbO3 without any additional optical elements. To achieve velocity matching of the terahertz wave and the probe beam, the terahertz wave is introduced into the crystal through a Si prism at the Cherenkov angle to the probe beam. The workability of the scheme at different wavelengths of the probe optical beam (800 and 1550 nm) is demonstrated.

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Phase-Matching in Nonlinear Crystal-Based Monochromatic Terahertz-Wave Generation

Liu

Niu

et al. 2022

Crystals

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Optically pumped nonlinear frequency down conversion is a proven approach for monochromatic terahertz (THz)-wave generation that provides superior properties such as continuous and wide tunability as well as laser-like linewidth and beam quality. Phase-matching (PM) is an important connection between the pump sources and nonlinear crystals and determines the direction of energy flow (as well as the output power). In past decades, a variety of peculiar PM configurations in the THz region have been invented and are different from the traditional ones in the optical region. We summarize the configurations that have been applied in nonlinear THz-wave generation, which mainly fall in two categories: scalar (collinear) PM and vector PM (including macroscopic noncollinear PM and microscopic vector PM). The development of this technique could relax the matching conditions in a wide range of nonlinear crystals and pump wavelengths and could finally promote the improvement of coherent THz sources.

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Generation of narrowband terahertz radiation by an ultrashort laser pulse in a bulk LiNbO_3 crystal

Cited by 3 publications

References 23 publications

Low-threshold terahertz-wave generation based on a cavity phase-matched parametric process in a Fabry–Perot microresonator

Low-threshold terahertz-wave generation based on a cavity phase-matched parametric process in a Fabry–Perot microresonator

Noncollinear electro-optic sampling detection of terahertz pulses in a LiNbO₃ crystal while avoiding the effect of intrinsic birefringence

Phase-Matching in Nonlinear Crystal-Based Monochromatic Terahertz-Wave Generation

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Generation of narrowband terahertz radiation by an ultrashort laser pulse in a bulk LiNbO_3 crystal

Cited by 3 publications

References 23 publications

Low-threshold terahertz-wave generation based on a cavity phase-matched parametric process in a Fabry–Perot microresonator

Low-threshold terahertz-wave generation based on a cavity phase-matched parametric process in a Fabry–Perot microresonator

Noncollinear electro-optic sampling detection of terahertz pulses in a LiNbO3 crystal while avoiding the effect of intrinsic birefringence

Phase-Matching in Nonlinear Crystal-Based Monochromatic Terahertz-Wave Generation

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Noncollinear electro-optic sampling detection of terahertz pulses in a LiNbO₃ crystal while avoiding the effect of intrinsic birefringence