Low-repetition frequency and high-stability subnanosecond pulsed green laser generator

Abstract

The invention provides a low-repetition frequency and high-stability subnanosecond pulsed green laser generator, which comprises four cavity mirrors (M1, M2, M3 and M4), an active medium, a polarizer, an electro-optical modulator and a quarter-wave plate are sequentially arranged between the cavity mirror M1 and the cavity mirror M2, and the low repetition frequency of 1KHz is chosen as the repetition rate of the electro-optical modulator; a frequency doubling crystal and a double-walled carbon nanotube passive saturable absorber are sequentially arranged between the cavity mirror M3 and the cavity mirror M4; the repetition rate of actively and passively dual-loss-modulated Q-switched mode-locked fundamental frequency infrared laser depends on the repetition rate of active electro-optical modulation, and the mode-locked pulses in Q-switched envelopes depend on active modulation and passive saturated absorption; the widths of the Q-switched envelopes are less than the round trip time of the fundamental frequency laser, each Q-switched envelope has only one mode-locked pulse oscillation, and the green laser which is generated after the frequency of the fundamental frequency infrared laser is doubled by the frequency doubling crystal is a high-stability, low-repetition frequency and subnanosecond mode-locked pulse. The low-repetition frequency and high-stability subnanosecond pulsed green laser generator has a low pulse repetition rate and high stability; the widths of the pulses are of the mode-locked pulse width subnanosecond scale in the Q-switched envelopes, and moreover, the low-repetition frequency and high-stability subnanosecond pulsed green laser generator has high-peak power.

Description

technical field [0001] The invention relates to a method for generating low repetition frequency, high stability, and sub-nanosecond pulsed green laser light, which belongs to the field of laser technology. Background technique [0002] All-solid-state short-pulse 0.53μm green laser has broad applications in military, laser medical, laser measurement, information storage and other fields. The pulse width and repetition rate of green laser are important indicators in laser applications, because the pulse width and repetition rate determine the time and dynamics of the interaction between light and matter. Low repetition rate not only improves the peak power of the pulse, but also In life measurement, the range of life measurement can be increased, so people pay great attention to it. [0003] The 1.06μm fundamental frequency infrared laser generated by the neodymium-doped active medium, the frequency doubling conversion of the nonlinear crystal is the most common method to o...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the existing single continuous mode-locking, Q-switching or Q-switching mode-locking technology is difficult to obtain low repetition frequency, high stability, and sub-nanosecond pulsed green laser. Frequency doubling conversion of linear crystals, a low repetition frequency and high stability sub-nanosecond pulsed green laser generation device

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