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- Title
A Novel α -BaTeMo 2 O 9 Acousto-Optic Switch for Generating Stable 639 nm Pulsed Laser.
- Authors
Zhang, Ke; Guo, Feifei; Jin, Yicheng; Li, Kuan; Meng, Lihua; Wang, Peifu; Liu, Shande; Gao, Zeliang; Tao, Xutang
- Abstract
In this paper, an acousto-optic (AO) Q-switch based on α-BaTeMo2O9 (α-BTM) crystal is designed and further applied to generate a laser pulse at 639 nm for the first time. The α-BTM AO Q-switch demonstrates a large diffraction angle of 0.93° and a high diffraction efficiency of 85% at 639 nm. In the experiment, a maximum AO Q-switched output power of 362 mW is achieved at a repetition rate of 30 kHz, under a maximum absorbed pump power of 3.60 W, corresponding to a slope efficiency of 15.2%. With transmittance of T = 3%, the shortest Q-switching pulse width of 54.7 ns is generated at a repetition rate of 1 kHz. Meanwhile, the beam quality factor M2 of the above laser is measured, presenting the magnitude of 1.14 at both x and y directions. Our findings indicate that α-BTM AO Q-switch could act as an excellent switching device at 639 nm which may help to explore potential applications in the visible field.
- Subjects
PULSED lasers; Q-switched lasers; LASER pulses; QUALITY factor; Q-switching
- Publication
Photonics, 2023, Vol 10, Issue 3, p334
- ISSN
2304-6732
- Publication type
Article
- DOI
10.3390/photonics10030334