Narrow no-gain competition linewidth dual-wavelength laser at 912 nm and 1064 nm

Abstract

A narrow linewidth, no-gain competition, 912 nm quasi-three level and 1064 nm four-level dual-wavelength laser is presented for the first time. This system consists of an intra-cavity pumped Nd:YVO 4 laser emitting at 1064 nm, using a 912 nm Nd:GdVO 4 laser. A Fabry-Perot etalon is used to compress the linewidth located at the common parts of the 912 nm and 1064 nm laser resonators. When the etalon, with an angle of refraction of 15°, was introduced into the cavity, the narrow linewidth dual-wavelength laser was obtained. The corresponding minimum linewidths were 0.284 nm and 0.627 nm.

Output Characteristics of Narrow No-Gain Competition Linewidth Dual-Wavelength Laser at 912 nm and 1064 nm

“…In 2010, a polarization-maintaining fiber Bragg grating and a F-P fiber filter were used to facilitate a dual-wavelength output with a power separately −2.259 dBm and 0.568 dBm, with a 3 dB bandwidth separately 0.102 nm and 0.1402 nm and the central wavelength separately 1547.778 nm and 1548.222 nm [6]. In 2018, the narrow linewidth dual-wavelength lasers were obtained, by using a F-P etalon with an angle of refraction of 15˚, the linewidths were reduced from 1.52 nm to 0.28 nm and 1.16 nm to 0.63 nm at 912 nm and 1064 nm, respectively, with the the output power of 17 mW at 912 nm and 16 mW at 1064 nm [7], however the output characteristics of narrow linewidth dual-wavelength solid-state laser were not studied.…”