Singly-resonant optical parametric oscillation based on the wide band-gap mid-IR nonlinear optical crystal LiGaS2

Tyazhev, Aleksey; Vedenyapin, V.; Marchev, Georgi; Исаенко, Л. И.; Kolker, D. B.; Lobanov, S.; Petrov, Valentín; Yelisseyev, A.; Старикова, М. К.; Zondy, J.‐J.

doi:10.1016/j.optmat.2013.03.016

Cited by 56 publications

(41 citation statements)

References 7 publications

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“…7a for LISe-2 at axial pump fluence exceeding 377 mJ/cm 2 or peak intensity >27 MW/cm 2 ). Thus, this shifted our interest to LGS [53] and BGS [54] which exhibit the largest band-gaps (Table I) and are colourless (Fig. 2).…”

Section: Mid-ir Oposmentioning

confidence: 99%

“…The estimated signal linewidth at 1322 nm was 1.9 cm -1 . Both signal (4.4 ns) and idler (5.4 ns) pulse durations were shorter compared to the pump and the idler pulse measurement was most probably detector response limited [53]. Thus, the main challenge for LGS is the availability of longer samples to reduce the OPO threshold.…”

Section: Mid-ir Oposmentioning

confidence: 99%

“…CSP was the first NLC in which for the first time with any OPO, sub-ns signal and idler pulse durations were obtained by using relatively short crystal / cavity lengths and pumping with 1-ns, 1-kHz pulses at 1064 nm [50]. The pump system was the same as described above for LGS, an experiment realized later [53], however, the exceptionally high FM of CSP ( Fig. 1) resulted in much lower OPO threshold and higher conversion efficiency without any damage problems.…”

Section: Mid-ir Oposmentioning

confidence: 99%

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Progress in 1-μm Pumped Mid-IR Optical Parametric Oscillators Based on Non-Oxide Nonlinear Crystals

Petrov

2015

IEEE J. Select. Topics Quantum Electron.

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Pumping mid-IR optical parametric oscillators near 1 µm is attractive for its simplicity and power scaling capability. To this aim, wide band-gap non-oxide nonlinear crystals are needed. This paper reviews the recent developments in crystal growth and singly resonant optical parametric oscillators for generation of high single pulse energy and average powers in the mid-IR from 3 to 10 µm.Index Terms-mid-infrared spectral range, optical parametric oscillators, non-oxide nonlinear crystals, nanosecond pulses, high energy and average power 1077-260X (c)

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Section: Mid-ir Oposmentioning

confidence: 99%

Section: Mid-ir Oposmentioning

confidence: 99%

Section: Mid-ir Oposmentioning

confidence: 99%

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Progress in 1-μm Pumped Mid-IR Optical Parametric Oscillators Based on Non-Oxide Nonlinear Crystals

Petrov

2015

IEEE J. Select. Topics Quantum Electron.

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“…While oxide-based periodically-poled nonlinear compounds belonging to the ferroelectric crystal family (mainly LiNbO 3 , LiTaO 3 and KTiOPO 4 ) are commercially available, their IR transparency does not exceed 5 microns and therefore they cannot be used for deeper MIR applications. For instance the [8][9][10][11][12][13][14] μm range corresponding to one of the atmospheric transparency window is interesting for LIDAR or countermeasure systems while coherent sources in the strongly water-absorbing 6-7 μm range can be used for medical (surgery) applications. More generally tunable coherent MIR laser sources are useful spectroscopic tools to probe rovibrational molecular fingerprints with various applications in trace gas sensing such as environmental monitoring, detection of hazardous species, life science or medical applications such as real-time breath analysis for early disease diagnosis [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Widely tunable (2.6–10.4μm) BaGa₄Se₇optical parametric oscillator pumped by a Q-switched Nd:YLiF₄laser

et al. 2018

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We report on the first BaGa 4 Se 7 nanosecond optical parametric oscillator pumped by Q-switched Nd:YLiF 4 laser at 1053 nm. The oscillator exhibits a pump threshold energy as low as 0.25 mJ. Midinfrared (MIR) idler wave tuning from 2.6 μm to 10.4 μm is demonstrated with an angle-tuned type-I (o-ee) y-cut sample, highlighting the superior performance of this novel large bandgap chalcogenide nonlinear crystal to generate tunable coherent radiation over its full MIR transparency range (0.47-18 μm). The phase-matching data are used to identify the most accurate dispersion relations of this compound among three recently published Sellmeier equations. Damage threshold measurements yielded values as high as 2.04 J cm −2 at 100 Hz pulse repetition rate, one of the largest among existing MIR χ (2) nonlinear materials.

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“…1 This can be understood on the basis of higher optical damage intensity limit when the pulses get shorter, although this increase is slower compared to the pulse peak intensity dependence, i.e., the optical damage threshold depends both on pump fluence and on intensity. 24,25,27 The above makes it clear how detrimental damage effects in mid-IR NLCs are when such crystals are employed in nanosecond OPOs. It is related to a lesser extent to thermal effects like lensing or phase-mismatch caused by local heating as a consequence of residual crystal absorption rather than to a cumulative damage at higher repetition rates.…”

Section: Introductionmentioning

confidence: 99%

Optical damage studies of mercury thiogallate nonlinear crystals for use in 1-μm pumped optical parametric oscillators

et al. 2013

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We investigated optical damage (surface and bulk) in one of the most promising wide bandgap nonoxide nonlinear crystals, HgGa 2 S 4 , that can be used in ∼1-μm pumped optical parametric oscillators (OPOs) and synchronously pumped OPOs (SPOPOs) for generation of idler pulses above 4 μm without two-photon absorption losses at the pump wavelength. The optical damage has been characterized at the pump wavelength for different repetition rates using uncoated and antireflectioncoated (mainly with a single layer for pump and signal wavelengths) samples. HgGa 2 S 4 is the most successful nonlinear crystal (both in terms of output energy and average power) for such OPOs, but optical damage inside the OPO has a lower threshold and represents at present the principal limitation for the achievable output. It is related to peak pulse and not to average intensity, and bulk damage in the form of scattering centers occurs before surface damage. Such bulk damage formation is faster at higher repetition rates. Lower repetition rates increase the lifetime of the crystal but do not solve the problem. The safe pump fluence in extracavity measurements is <1 J∕cm 2 , which corresponds to ∼100 MW∕cm 2 for the 8-ns pulse duration (both values peak on-axis). In the OPO, however, peak on-axis fluence should not exceed 0.3 J∕cm 2 limited by the formation of bulk scattering centers in orange-phase HgGa 2 S 4 . In the nanosecond OPO regime, the damage resistivity of Cd-doped HgGa 2 S 4 is higher and that of the almost colorless CdGa 2 S 4 is roughly two times higher, but the latter has no sufficient birefringence for phase-matching. In SPOPOs operating in the ∼100 MHz regime, the damage limitations are related both to the peak pulse and the average intensities, but here HgGa 2 S 4 seems the best nonoxide candidate to obtain first steady-state operation with Yb-based mode-locked laser pump sources.

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Singly-resonant optical parametric oscillation based on the wide band-gap mid-IR nonlinear optical crystal LiGaS2

Cited by 56 publications

References 7 publications

Progress in 1-μm Pumped Mid-IR Optical Parametric Oscillators Based on Non-Oxide Nonlinear Crystals

Progress in 1-μm Pumped Mid-IR Optical Parametric Oscillators Based on Non-Oxide Nonlinear Crystals

Widely tunable (2.6–10.4μm) BaGa₄Se₇optical parametric oscillator pumped by a Q-switched Nd:YLiF₄laser

Optical damage studies of mercury thiogallate nonlinear crystals for use in 1-μm pumped optical parametric oscillators

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Singly-resonant optical parametric oscillation based on the wide band-gap mid-IR nonlinear optical crystal LiGaS2

Cited by 56 publications

References 7 publications

Progress in 1-μm Pumped Mid-IR Optical Parametric Oscillators Based on Non-Oxide Nonlinear Crystals

Progress in 1-μm Pumped Mid-IR Optical Parametric Oscillators Based on Non-Oxide Nonlinear Crystals

Widely tunable (2.6–10.4μm) BaGa4Se7optical parametric oscillator pumped by a Q-switched Nd:YLiF4laser

Optical damage studies of mercury thiogallate nonlinear crystals for use in 1-μm pumped optical parametric oscillators

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Product

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Widely tunable (2.6–10.4μm) BaGa₄Se₇optical parametric oscillator pumped by a Q-switched Nd:YLiF₄laser