Nanosecond difference-frequency generation in orientation-patterned gallium phosphide

Wei, Junxiong; Kumar, S. Chaitanya; Ye, Hanyu; Devi, Kavita; Schunemann, Peter G.; Ebrahim-Zadeh, M.

doi:10.1364/ol.42.002193

Cited by 14 publications

(12 citation statements)

References 16 publications

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“…Recently, we also demonstrated tunable difference-frequency-generation (DFG) in OP-GaP by mixing the input pulses from a nanosecond Nd:YAG laser and the signal from a MgO:PPLN OPO driven by the same laser at 80 kHz repetition rate [11]. In the continuous-wave (CW) regime, singlepass DFG based on OP-GaP using the pump wavelength of 1064 nm and signal wavelengths at 1550 nm [12] and 1301 nm [13] has also been reported.…”

Section: Introductionmentioning

confidence: 99%

Picosecond difference-frequency-generation in orientation-patterned gallium phosphide

et al. 2017

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Abstract:We report the generation of tunable high-repetition-rate picosecond radiation in the mid-infrared using the new quasi-phase-matched nonlinear material of orientation-patterned gallium phosphide (OP-GaP). The source is realized by single-pass difference-frequencygeneration (DFG) between the output signal of a picosecond optical parametric oscillator (OPO) tunable across 1609-1637 nm with input pump pulses at 1064 nm in OP-GaP, resulting in tunable radiation across 3040-3132 nm. Using a 40-mm-long crystal, we have generated up to 57 mW of DFG average power at ~80 MHz repetition rate for a pump power of 5 W and signal power of 0.9 W, with >30 mW over >50% of the tuning range. The DFG source exhibits a passive power stability better than 3.2% rms over 1 hour in good spatial beam quality. To the best of our knowledge, this is the first picosecond frequency conversion source based on OP-GaP.

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Section: Introductionmentioning

confidence: 99%

Picosecond difference-frequency-generation in orientation-patterned gallium phosphide

et al. 2017

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“…We also recently demonstrated tunable difference-frequency-generation (DFG) source based on OP-GaP by mixing the input pulses from a nanosecond Nd:YAG pump laser and the signal from a MgO:PPLN OPO in a 40-mm-long crystal, resulting in the generation of tunable mid-IR radiation over 2548 -2781 nm with ~14 mW of output power at 2719 nm at 80 kHz repetition rate [13]. In the CW regime, single-pass DFG based on 16.5-mm-long OP-GaP crystal was reported, providing up to 150 mW at 3400 nm for an input pump power of 47 W at 1064 nm together with 24 W of signal power at 1550 nm [14].…”

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confidence: 99%

Optical parametric generation in orientation-patterned gallium phosphide

Kumar²,

Wei

et al. 2017

Opt. Lett.

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We report the first optical parametric generator (OPG) based on the new nonlinear material, orientationpatterned gallium phosphide (OP-GaP). Pumped by a Qswitched nanosecond Nd:YAG laser at 1064 nm with 25 kHz pulse repetition rate, the OPG can be tuned across 1721-1850 nm in the signal and 2504-2787 nm in the idler. Using a 40-mm-long crystal in single pass, we have generated a total average output power of up to ~18 mW, with ~5 mW of idler power at 2670 nm, for 2 W of input pump power. The OPG exhibits a passive stability in total output power better than 0.87% rms over 1 hour, at a crystal temperature of 120 ºC, compared to 0.14% rms for the input pump. The output signal pulses, recorded at 1769 nm, have duration of 5.9 ns for input pump pulses of 9 ns. Temperature-dependent loss measurements for the pump polarization along the [100] axis in the OP-GaP crystal have also been performed, for the first time, indicating a drop in transmission from 28.8% at 50ºC to 19.4% at 160ºC. © 2015 Optical Society of America OCIS codes : (190.4360) Nonlinear optics, devices; (190.4400) Nonlinear optics, materials; (190.4410 Mid-infrared (mid-IR) coherent sources based on optical parametric down-conversion are of great significance for a variety of applications such as spectroscopy [1], up-conversion imaging [2] and as pump source for other nonlinear processes [3]. Oxide-based nonlinear crystals, and especially their quasi-phase matched (QPM) counterparts such as MgO-doped periodically-poled LiNbO3 (MgO:PPLN), stoichiometric LiTaO3 (MgO:sPPLT) and KTiOPO4 (PPKTP), have enabled broadband mid-IR coverage up to ~4 μm, in all time-scales from continuous-wave (CW) to femtosecond domain [4][5][6][7]. However, the onset of multiphonon absorption in these nonlinear crystals has been a fundamental barrier to reach spectral regions into the deep mid-IR. Non-oxide-based nonlinear materials with extended transparency in the mid-IR, such as ZnGeP2 (ZGP) and orientation-patterned GaAs (OP-GaAs), offer potential for the development of parametric sources beyond 4 μm. However, their low bandgap requires pumping beyond 2 μm to avoid two-photon absorption. The more recently developed nonlinear crystal, CdSiP2 (CSP), is an important new addition to the family of birefringent nonlinear materials for parametric downconversion into the deep mid-IR. The high optical nonlinearity, noncritical phase-matching (NCPM) capability, and a wide transparency range extending down to below ~1 μm, enable the deployment of the widely available Nd-based solid-state or Ybbased fiber lasers as pump source for deep mid-IR wavelength generation up to ~7 μm [8,9]. On the other hand, the new semiconductor nonlinear material, orientation-patterned GaP (OPGaP) can be considered as the QPM analog of CSP, and a promising alternative for deep mid-IR generation. As a QPM material, OP-GaP offers unique flexibility for tunable wavelength generation into the deep mid-IR using grating engineering under NCPM with no spatial walk-off. Moreover, unlike ZGP and OP-GaAs, it has sig...

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“…The schematic of the experimental setup for single-pass DFG in OP-GaP is similar to that described in Ref [16]. The input pump source is a Q-switched Nd:YAG laser (Bright Solutions, Sol), delivering up to 30 W of average power at ~1064 nm in linear polarization, with a tunable repetition rate of 20-100 kHz.…”

Section: Methodsmentioning

confidence: 99%

“…These include a nanosecond OPO in doubly-resonant oscillator (DRO) configuration pumped at 1.064 μm, generating 4 mW of idler at 4624 nm and 15 mW of signal at 1324 nm at 10 kHz [14], as well as a nanosecond DRO pumped at 2.090 μm operating at a fixed idler wavelength of 5100 nm and a signal wavelength of 3540 nm, providing a total signal plus idler output power of 350 mW at 20 kHz [15]. Recently, we also demonstrated a tunable DFG source based on OP-GaP operating across 2548-2781 nm by mixing the input pulses from a Q-switched nanosecond Nd:YAG pump laser at 1.064 μm with the tunable signal from a MgO:PPLN pulsed OPO in a 40-mm-long crystal, providing up to ~14 mW of average output power at 80 kHz repetition rate [16]. In another report, we demonstrated an optical parametric generator (OPG) based on OP-GaP pumped directly by a Q-switched Nd:YAG laser at 1.064 μm [17].…”

Section: Introductionmentioning

confidence: 99%

Performance characterization of mid-infrared difference frequency generation in orientation-patterned gallium phosphide

Wei¹,

Suddapalli²,

Ebrahim-Zadeh³

et al. 2018

Nonlinear Frequency Generation and Conversion: Materials and Devices XVII

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Abstract:We present a detailed characterization of the optical properties of the recently developed nonlinear material, orientation-patterned gallium phosphide (OP-GaP), by performing difference-frequency-generation experiments in the 2548-2782 nm wavelength range in the mid-infrared (mid-IR). Temperature and spectral acceptance bandwidth measurements have been performed to study the phase-matching characteristics of OP-GaP, and the dependence of nonlinear gain on the polarization of input incident fields has been investigated. The transmission of the OP-GaP crystal at the pump and signal wavelengths has been studied and found to be dependent on polarization as well as temperature. Further, we have observed a polarization-dependent spatial shift in the transmitted pump beam through the OP-GaP sample. We have also measured the damage threshold of the OP-GaP crystal to be 0.84 J/cm 2 at 1064 nm.

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Nanosecond difference-frequency generation in orientation-patterned gallium phosphide

Cited by 14 publications

References 16 publications

Picosecond difference-frequency-generation in orientation-patterned gallium phosphide

Picosecond difference-frequency-generation in orientation-patterned gallium phosphide

Optical parametric generation in orientation-patterned gallium phosphide

Performance characterization of mid-infrared difference frequency generation in orientation-patterned gallium phosphide

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