A tunable single-frequency green laser based on a wedged Nd:YVO4 crystal and a KTP crystal. (3rd May 2021)

• Record Type: Journal Article
• Authors: Gao, Z H; Zhang, W X; Yan, B X; Kong, X X; Zhao, Y S; Wu, Z; Guo, X L; Feng, Q B
• Is Part Of: Laser physics. Volume 31:Number 6(2021)
• Publication Date: 2021-05-03
• Subjects: Nd:YVO4 crystal -- single-frequency -- birefringent filter; Lasers -- Periodicals; 621.36605
• DOI: 10.1088/1555-6611/abf9a0
• Languages: English
• ISSNs: 1054-660X

Abstract

Abstract: A 532 nm single-frequency laser generated from a V-type oscillator configuration with a wedged Nd:YVO4 crystal and a KTP crystal is reported. An a-cut, 2.at% Nd:YVO4 crystal with a wedge angle of 10° and a KTP nonlinear crystal composes a novel birefringent filter. By adjusting the incident angle of the fundamental mode in the KTP, the laser can change from single-mode operation to two-mode oscillation. The maximum single-frequency output power of lasers with a 5 mm long KTP and a 7 mm long KTP are 284 and 148 mW, respectively, at pump powers of 2 and 1.1 W. The corresponding optical-to-optical conversion efficiencies are 14.2% and 13.5%. For the laser configuration with a 5 mm long KTP, the single-frequency operation at a pump power of 2 W is maintained within the temperature range of 18 °C to 24 °C, and the measured wavelength drift rate with the temperature is approximately 0.071 nm °C −1 .