A Broadband Dual Oscillator Parametric Oscillator Reflecting Injected Pump Light

Abstract

The invention discloses a broadband dual-oscillation parametric oscillator that reflects and injects pump light, belongs to the field of optical parametric oscillators, and includes a resonant cavity, a nonlinear crystal, and a dielectric mirror; the first plane of the dielectric mirror increases reflection of the pump light and Anti-reflection for signal light, its second plane is anti-reflection for signal light; under working condition, the dielectric mirror is located at any position in the propagation direction of signal light in the resonator except the focusing cavity, and the incident direction of pump light is located on the side of the first plane of the dielectric mirror , the incident direction of the signal light is located on the second plane side of the dielectric mirror, and the outgoing direction of the pump light and the signal light coincide; the nonlinear crystal is located in the focusing cavity of the resonator; the nonlinear crystal is used to parametrically amplify the signal light; the dielectric mirror is used After the pumping light is reflected, the outgoing directions of the pumping light and the signal light are coincident. The cavity of the dual-oscillation optical parametric oscillator of the present invention does not have the dispersion introduced by the broadband high-reflection film, thus overcoming the problem of limiting the broadband of the signal light due to the dispersion of the high-reflection film.

Description

technical field [0001] The invention belongs to the field of optical parametric oscillators, and more specifically relates to a broadband dual-oscillation parametric oscillator that reflects and injects pump light. Background technique [0002] Ultrashort pulses have the advantages of good spatial coherence, extremely high peak power and good time resolution, and are widely used in the frontiers of various disciplines. In the visible and near-infrared bands, mode-locked lasers are usually used to generate ultrashort pulses; in the mid-infrared band, difference frequency generators and optical parametric oscillators are generally used to generate ultrashort pulses. The optical parametric oscillator operating in the parallel state has a very wide phase-matching bandwidth, which is suitable for ultrashort pulse and broadband frequency comb generation. [0003] In 2011, Nick Leindecker et al. obtained a 91fs pulse output through a degenerate optical parametric oscillator, and i...

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Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to provide a bandwidth dual-oscillation optical parametric oscillator that reflects and injects pump light, aiming at solving the problem of the transmission-type pump input coupling mirror in the existing dual-oscillation optical parametric oscillator. High reflection film has high dispersion, which leads to the problem of limited bandwidth of signal light

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