Phase-matching properties and refined Sellmeier equations of the new nonlinear infrared crystal CdSiP_2

Kemlin, Vincent; Brand, Pierre; Boulanger, Benoı̀t; Segonds, Patricia; Schunemann, Peter G.; Zawilski, Kevin T.; Ménaert, Bertrand; Debray, Jérôme

doi:10.1364/ol.36.001800

Cited by 21 publications

(13 citation statements)

References 4 publications

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“…In 2010, Zawilski and Schunemann reported the growth of a large crack-free CdSiP 2 single crystal with dimensions of 70 Â 25 Â 8 mm 3 grown for the first time using the transparent horizontal gradient freezing method. This result demonstrated that large single crystal CdSiP 2 can be grown from the melt [29], and the nonlinearity, and phase matching properties of the crystal has been studied in following papers [30,31]. In this paper, for the first time, to the best of our knowledge, we report the synthesis of high purity polycrystalline CdSiP 2 in a single-temperature zone furnace and the growth of single crystal CdSiP 2 with a diameter of 8 mm, and a length of 40 mm using the vertical Bridgman method.…”

Section: Introductionmentioning

confidence: 74%

Growth of CdSiP2 single crystals by self-seeding vertical Bridgman method

Zhang

Tao

Ruan

et al. 2012

Journal of Crystal Growth

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Section: Introductionmentioning

confidence: 74%

Growth of CdSiP2 single crystals by self-seeding vertical Bridgman method

Zhang

Tao

Ruan

et al. 2012

Journal of Crystal Growth

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“…In this Letter, we introduce the first example of a femtosecond-laser-pumped OPO based on the newly developed nonlinear crystal, CdSiP 2 (CSP), which was recently identified as a promising material allowing efficient type-I phase-matched nonlinear conversion to >6 μm when pumped at near 1 μm [7][8][9][10][11][12][13][14]. Recent work on the phase-matching properties of CSP has even identified type-II and type-III routes to 9.5 μm using 1.064 μm pumping, validated by experimental difference frequency generation (DFG) data at wavelengths up to 9.5 μm [9]. These results, all of which were obtained in low-repetition-rate or Q-switched mode-locked regimes, motivated us to investigate the performance of CSP in a cw-mode-locked configuration, promising the possibility of continuous ultrabroadband mid-IR light for Fouriertransform and frequency-comb OPO spectroscopy.…”

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confidence: 99%

Femtosecond-laser pumped CdSiP_2 optical parametric oscillator producing 100 MHz pulses centered at 62 μm

et al. 2013

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We report the first, to the best of our knowledge, femtosecond-laser-pumped optical parametric oscillator (OPO) based on the newly developed nonlinear crystal, CdSiP₂. The OPO was synchronously pumped by a mode-locked Yb:KYW/Yb:fiber master-oscillator power amplifier, providing 1.053 μm pump pulses with durations of 130 fs at a repetition rate of 100 MHz. The 0.5-mm-thick CdSiP₂ crystal was cut for a type-I noncritical interaction, providing a broad phase-matching bandwidth and ensuring excellent temporal overlap among the pump, signal, and idler pulses. The OPO generated signal pulses with a spectral coverage over 1260-1310 nm and mid-infrared idler pulses with a broad spectral coverage at 5.8-6.6 μm (6.2 THz). With a 2% output coupler (OC), the threshold pump power was 600 mW. At the maximum pump power of 1.6 W, 0.55 W was absorbed due to two-photon absorption and residual linear absorption in the CdSiP₂ crystal, 0.75 W was transmitted, and 53 mW signal power was extracted through the OC. We estimate that the generated idler power was 24 mW.

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“…2, relative to the pump spectrum. However, using the recently reported Sellmeier equations, a parametric gain bandwidth up to ∼19 nm is estimated for the same CSP crystal [10]. As evident from Fig.…”

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confidence: 77%

High-power femtosecond mid-infrared optical parametric oscillator at 7 μm based on CdSiP_2

et al. 2015

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We report a femtosecond optical parametric oscillator (OPO) for the mid-infrared (mid-IR), generating a record average power of 110 mW at 7 μm. The OPO, based on CdSiP 2 (CSP) as the nonlinear crystal, provides idler wavelength tuning across 6540-7186 nm with spectral bandwidths >400 nm at −10 dB level over the entire range, and a maximum bandwidth of 478 nm at 6.9 μm. To the best of our knowledge, this is the highest average power generated from a femtosecond OPO in the deep mid-IR. The OPO also provides near-IR signal wavelengths tunable across 1204-1212 nm with a usable power of 450 mW in 418-fs pulses at 1207 nm. The simultaneously measured signal and idler power exhibit a passive stability better than 1.6% rms and 3% rms, respectively. A mid-IR idler spectral stability with a standard deviation of the frequency fluctuations better than 40 MHz over 15 min, limited by the measurement resolution, is realized. Using the mid-IR idler from the CSP OPO, we perform Fourier-transform spectroscopy to detect liquid phase organic solvent, toluene (C 7 High-power femtosecond sources providing broadband pulses with wide spectral coverage in the mid-infrared (mid-IR) are of great interest for a variety of applications including spectroscopy, frequency comb generation, and sensitive detection of gas and liquid phase chemical species [1]. Synchronously pumped optical parametric oscillators (OPOs) are versatile and practical sources of such radiation. However, the development of femtosecond OPOs for the mid-IR using the well-established oxide-based nonlinear crystals such as periodically poled LiNbO 3 is practically limited to ∼5 μm, imposed by the onset of material absorption. As such, access to femtosecond pulses beyond 5 μm has relied on differencefrequency-generation (DFG) [2] or tandem OPO pumping [3,4] using non-oxide-based nonlinear crystals such as GaSe and AgGaSe 2 , or direct pumping of OPOs beyond 2 μm in combination with orientation-patterned GaAs [5] to avoid two-photon material absorption. On the other hand, the advancement of mid-IR femtosecond OPOs beyond 5 μm using technologically mature pump lasers near 1 μm is highly desirable by circumventing the scarcity of long-wavelength laser sources, complexities associated with external tandem OPOs, and power limitations of single-pass DFG techniques. In this context, the recently developed nonlinear material, cadmium silicon phosphide, CdSiP 2 (CSP), offers unique linear and nonlinear optical properties [6]. Its large bandgap, wide transparency range, high optical quality, improved thermal and optical properties, together with a high effective nonlinear coefficient (d eff ∼ 84 pm∕V) make it an attractive nonlinear material for mid-IR generation. Very importantly, CSP can also be pumped near 1 μm under noncritical phase-matching (NCPM) to generate mid-IR radiation in the 6-8 μm wavelength range. Earlier reports on ultrafast frequency conversion sources based on CSP include optical parametric generators [7] and OPOs [8] in the high-energy picosecond as well as femt...

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Phase-matching properties and refined Sellmeier equations of the new nonlinear infrared crystal CdSiP_2

Cited by 21 publications

References 4 publications

Growth of CdSiP2 single crystals by self-seeding vertical Bridgman method

Growth of CdSiP2 single crystals by self-seeding vertical Bridgman method

Femtosecond-laser pumped CdSiP_2 optical parametric oscillator producing 100 MHz pulses centered at 62 μm

High-power femtosecond mid-infrared optical parametric oscillator at 7 μm based on CdSiP_2

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