Single-Stage Ti:sapphire-Pumped Deep-Infrared Femtosecond Optical Parametric Oscillator based on CdSiP2
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Cita com:
hdl:2117/129909
Col·laboradorO’Donnell, Callum F.; Chaitanya Kumar, S.; Schunemann, P. G.; Zawilski, Kevin T.; Ebrahim-Zadeh, Majid
Tipus de documentComunicació de congrés
Data publicació2018-02-20
EditorIEEE
Condicions d'accésAccés obert
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continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
We report a high-repetition-rate femtosecond optical parametric oscillator (OPO) for the deep-infrared (deep-IR) based on the nonlinear optical crystal, CdSiP 2 (CSP), pumped directly by a Ti:sapphire laser, for the first time. By pumping CSP at <;1 μm, we have achieved practical output powers at the longest wavelengths generated by any Ti:sapphire-pumped OPO. Using a combination of pump wavelength tuning, type-I critical phase matching, and cavity delay tuning, we have generated continuously tunable radiation across 6654-8373 nm (1194-1503 cm -1 ) at 80.5-MHz repetition rate, providing up to 20 mW of average power at 7314 nm and >7 mW beyond 8000 nm, with idler spectra exhibiting bandwidths of 140-180 nm across the tuning range. Moreover, the near-IR signal is tunable across 1127-1192 nm, providing up to 37 mW of average power at 1150 nm. Signal pulses, characterized using intensity autocorrelation, have durations of ~260-320 fs, with corresponding time-bandwidth product of ΔυΔτ ~ 1. The idler and signal output exhibit a TEM00 spatial profile with single-peak Gaussian distribution. With an equivalent spectral brightness of ~6.68 × 10 20 photons s -1 mm -2 sr -1 0.1% BW -1 , this OPO represents a viable alternative to synchrotron and supercontinuum sources for deep-IR applications in spectroscopy, metrology, and medical diagnostics.
CitacióO’Donnell, C. F. [et al.]. Single-Stage Ti:sapphire-Pumped Deep-Infrared Femtosecond Optical Parametric Oscillator based on CdSiP2. A: O’Donnell, Callum F.. "IEEE Journal of Selected Topics in Quantum Electronics". IEEE, 2018.
Versió de l'editorhttps://ieeexplore.ieee.org/document/8295205
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15 CSP IEEE FINAL VERSION.pdf | 1,366Mb | Visualitza/Obre |