A cavity length locking method and system for a dual-resonance optical parametric oscillator

Abstract

The invention discloses a cavity length locking method and system of a dual-resonance optical parametric oscillator, which belongs to the field of optical parametric oscillators. The short pulse is used as the feedback reference light; the wavelength selection element is used to select the laser with the preset wavelength in the feedback reference light; the cavity length locking unit receives the laser with the preset wavelength in the feedback reference light selected by the wavelength selection element to control the double resonance The cavity length of the optical parametric oscillator is locked to the cavity length corresponding to the maximum power of the preset wavelength laser in the output ultrashort pulse, so as to realize the stability of the output power of the double-resonant optical parametric oscillator. The invention utilizes the wavelength selection element to select the power of a certain narrow-band spectrum inside the spectrum of the ultrashort pulse for power locking, which improves the locking stability of the cavity length locking system and realizes laser output with stable power.

Description

Technical field

[0001] The present invention relates to the technical field of dual resonant variable oscillator, and more particularly to a cavity length locking method and system of a double resonant variable oscillator. Background technique

[0002] Ultra-fast laser generally refers to pulse lasers in pulse width in picoseconds, femtoseconds, and even anchodes. Ultra-fast laser has the advantages of narrow pulse width, high peak power, wide bandwidth, widely used in scientific research, medical, industry. For bands that cannot generate lasers directly through the respective laser gain media, such as medium infrared bands, people typically use the synchronous pump photoplast oscillator to convert ultra-fast lasers that require the desired wavelength. The photoplastic oscillator is divided into single oscillating photoplast oscillator and a dual resonant variable oscillator. In general, the threshold of the dual resonant variable oscillator is much lower than the single oscillat...

Examples

Embodiment 1

[0051] figure 1 The schematic diagram of the cavity length locking system of the ultrashort pulse double-resonant variable oscillator provided in Example 1. The cavity length locking system including a double resonant parameter oscillator and a wavelength selection element comprises: a diffraction grating, a photodetector, a signal processing circuit, and a cavity long controller. Wherein, the wavelength selection element is a diffraction grating as an example.

[0052] Among them, the inner laser laser is coupled out by outputting the coupling mirror, and the portion output laser is separated by the silicon window sheet as a feedback reference light for locking the cavity. The coupled laser is passed through a diffraction grating, and the light power of the predetermined wavelength after the light detector is received and converted into an electrical signal. When the converted electrical signal is sent to the signal processing system, after the data processing, the output electr...

Technical field

[0001] The present invention relates to the technical field of dual resonant variable oscillator, and more particularly to a cavity length locking method and system of a double resonant variable oscillator. Background technique

[0002] Ultra-fast laser generally refers to pulse lasers in pulse width in picoseconds, femtoseconds, and even anchodes. Ultra-fast laser has the advantages of narrow pulse width, high peak power, wide bandwidth, widely used in scientific research, medical, industry. For bands that cannot generate lasers directly through the respective laser gain media, such as medium infrared bands, people typically use the synchronous pump photoplast oscillator to convert ultra-fast lasers that require the desired wavelength. The photoplastic oscillator is divided into single oscillating photoplast oscillator and a dual resonant variable oscillator. In general, the threshold of the dual resonant variable oscillator is much lower than the single oscillat...

Examples

Embodiment 1

[0051] figure 1 The schematic diagram of the cavity length locking system of the ultrashort pulse double-resonant variable oscillator provided in Example 1. The cavity length locking system including a double resonant parameter oscillator and a wavelength selection element comprises: a diffraction grating, a photodetector, a signal processing circuit, and a cavity long controller. Wherein, the wavelength selection element is a diffraction grating as an example.

[0052] Among them, the inner laser laser is coupled out by outputting the coupling mirror, and the portion output laser is separated by the silicon window sheet as a feedback reference light for locking the cavity. The coupled laser is passed through a diffraction grating, and the light power of the predetermined wavelength after the light detector is received and converted into an electrical signal. When the converted electrical signal is sent to the signal processing system, after the data processing, the output electr...

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