Terahertz Sources Based on Intracavity Parametric Down-Conversion in Quasi-Phase-Matched Gallium Arsenide

Schaar, Joseph E.; Vodopyanov, K. L.; Kuo, Paulina S.; Fejer, M. M.; Yu, Xiaojun; Lin, A.; Harris, J. S.; Bliss, D.; Lynch, C.; Kozlov, V. G.; Hurlbut, Walter C.

doi:10.1109/jstqe.2008.917957

Cited by 46 publications

(34 citation statements)

References 44 publications

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“…Fig. 1c illustrates DFG, or inter-pulse DFG, which consists of the interaction of two distinct pulses at  1 and  2 with comparable number of photons [24,[42][43]. In OR (Fig.…”

Section: Second-order Schemes For Terahertz Generationmentioning

confidence: 99%

“…Although the processes described in section 2 can all be driven into a cascaded regime, the extent of cascading that can be attained with each technique is not the same. Cascading has been observed experimentally and/or studied theoretically in DFG [24,[42][43], OR [28], OPO [52], optically seeded OPAs [29][30][31][32][33][34]51]. Saito et al [52] demonstrated theoretically that OPOs can be cascaded.…”

Section: Cascading In Second-order Processes and Cascaded Opa For Termentioning

confidence: 99%

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Cascaded second-order processes for the efficient generation of narrowband terahertz radiation

Cirmi

Hemmer

Ravi

et al. 2017

J. Phys. B: At. Mol. Opt. Phys.

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The generation of high-energy narrowband terahertz radiation has gained heightened importance in recent years due to its potentially transformative impact on spectroscopy, high-resolution radar and more recently electron acceleration. Among various applications, such terahertz radiation is particularly important for table-top free electron lasers, which are at the moment a subject of extensive research. Second-order nonlinear optical methods are among the most promising techniques to achieve the required coherent radiation with energy >10 mJ, peak field >100 MV/m, and frequency between 0.1 and 1 THz. However, they are conventionally thought to suffer from low efficiencies <~10 -3 , due to the high ratio between optical and terahertz photon energies, in what is known as the Manley-Rowe limitation. In this paper, we review the current second-order nonlinear optical methods for the generation of narrowband terahertz radiation. We explain how to employ spectral cascading to increase the efficiency beyond the Manley-Rowe limit and describe the first experimental results in the direction of a terahertz-cascaded optical parametric amplifier, a novel technique which promises to fully exploit spectral cascading to generate narrowband terahertz radiation with few percent optical-to-terahertz conversion efficiency. _____________

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“…Fig. 1c illustrates DFG, or inter-pulse DFG, which consists of the interaction of two distinct pulses at  1 and  2 with comparable number of photons [24,[42][43]. In OR (Fig.…”

Section: Second-order Schemes For Terahertz Generationmentioning

confidence: 99%

Section: Cascading In Second-order Processes and Cascaded Opa For Termentioning

confidence: 99%

Cascaded second-order processes for the efficient generation of narrowband terahertz radiation

Cirmi

Hemmer

Ravi

et al. 2017

J. Phys. B: At. Mol. Opt. Phys.

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“…The regrowth leads to a crystalline structure with different phase orientations depending on whether the growth takes place on the original substrate or on the Ge layer. Orientationpatterned GaAs (OP-GaAs) has been used to demonstrate SHG [33], SHG from a mid-IR source [34], mid-IR continuum generation [35] and a terahertz source [36]. While this method of fabrication has the advantage of reducing scattering losses at the domain interfaces, complete bonding of the crystalline structure cannot be achieved due to the anti-phase orientation of the lattice, which ultimately leads to scattering.…”

Section: Quasi-phase Matchingmentioning

confidence: 99%

Recent advances in phase matching of second‐order nonlinearities in monolithic semiconductor waveguides

Helmy

Abolghasem

Aitchison

et al. 2010

Laser & Photonics Reviews

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Techniques used to assist phase matching of second-order nonlinearities in semiconductor waveguides are reviewed. The salient points of each method are highlighted, with their strengths and weaknesses with regard to various key applications discussed. Recent progress in these techniques is also reviewed. Emphasis is placed on two techniques, namely quasi-phase matching via domain disordering utilizing quantum well intermixing, and exact phase matching using Bragg reflection waveguides.The figure shows (a) An optical microscope image of an ion implantation mask used to fabricate gratings used for quasiphase matching, (b) a scanning electron micrograph of an ion implantation mask, (c) a scanning electron micrograph of a semiconductor ridge waveguide structure, and (d) an optical microscope image of group monolithic ring lasers designed for integration with quasiphase matched structures.

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“…Since the 1960s [1], efforts have been made to improve conversion efficiency from different aspects: pump lasers [2][3][4], nonlinear crystals [5][6][7][8], phase-matching and coupling geometries [9,10], and externalcavity enhancement [3,11,12]. As a nonlinear effect, high peak pump intensity is generally necessary.…”

Section: Introductionmentioning

confidence: 99%

“…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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Terahertz Sources Based on Intracavity Parametric Down-Conversion in Quasi-Phase-Matched Gallium Arsenide

Cited by 46 publications

References 44 publications

Cascaded second-order processes for the efficient generation of narrowband terahertz radiation

Cascaded second-order processes for the efficient generation of narrowband terahertz radiation

Recent advances in phase matching of second‐order nonlinearities in monolithic semiconductor waveguides

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

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