Open AccessModeling of time evolution of power and temperature in single-pulse and multi-pulses diode-pumped alkali vapor lasers
Author(s) -
Binglin Shen,
Jinghua Huang,
Xingqi Xu,
Chunsheng Xia,
Bailiang Pan
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.013396
Subject(s) - laser , materials science , diode , duty cycle , optics , pulse (music) , ultrafast laser spectroscopy , tunable diode laser absorption spectroscopy , spectroscopy , rate equation , optoelectronics , power (physics) , physics , detector , thermodynamics , quantum mechanics , kinetics
A physical model combining rate, power propagation, and transient heat conduction equations for diode-pumped alkali vapor lasers (DPAL) is applied to a pulsed Rb-CH 4 DPAL, which agrees well with the time evolution of laser power and temperature measured by K absorption spectroscopy. The output feature and temperature rise of a multi-pulse DPAL are also calculated in the time domain, showing that if we energize the pump light when the temperature rise decays to 1/2, rather than 1/e of its maximum, we can increase the duty cycle and obtain more output energy. The repetition rate of >100Hz is high enough to achieve QCW (quasi-continuous-wave) laser pulses.