AI Article Synopsis
- * This study demonstrates a new cw OPO using a small whispering gallery resonator made of cadmium silicon phosphide (CdSiP), achieving wavelength tunability from 2.3 μm to 5.1 μm when pumped with a 1.57-μm laser diode.
- * The system shows promising performance with low oscillation thresholds (milliwatt range) and a high power conversion efficiency over 15%, indicating CdSiP's potential for developing mid-infrared devices.
Article Abstract
Continuous-wave (cw) optical parametric oscillators (OPOs) are ideally suited for applications, for example high-resolution spectroscopy, that need coherent sources combining narrow-linewidth emission with good wavelength tunability. Here, we demonstrate for the first time cw OPOs based on a millimeter-sized whispering gallery resonator (WGR) made of cadmium silicon phosphide (CdSiP). By employing a compact laser diode at 1.57-μm wavelength for pumping, a cw OPO with wavelength tunability from 2.3 μm to 5.1 μm is realized based on such a resonator. The oscillation thresholds are in the milliwatt range. The maximum total power conversion efficiency reaches more than 15%. The intrinsic quality factor at 1.57 μm is determined to be 3.5 × 10. This work suggests that CdSiP is a very promising alternative for constructing mid-infrared parametric devices.
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| http://dx.doi.org/10.1364/OE.26.010833 | DOI Listing |
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