A 452nm frequency doubling system with adjustable power and deflection detection

Abstract

The invention discloses a power-adjustable and polarization-analyzable 452 nm frequency multiplication system. The frequency multiplication system comprises an MOPA, a collimation system, a frequencymultiplier and a frequency locking system; the MOPA comprises an external cavity diode laser, a conical amplifier, an optical isolator and a reflector; the collimation system comprises a mode matchinglens and a reflector; the frequency multiplier comprises an annular cavity, a quasi-phase matched KTP crystal, a polarizing film and a photoelectric detector; the frequency locking system comprises alambda / 2 wave plate, a lambda / 4 wave plate, a polarization splitting prism, a photoelectric detector, a subtracter, a piezoelectric ceramic and a reflector; the MOPA is used for providing basic laser; the collimation system enables the basic laser to be effectively coupled into the frequency multiplier; the frequency multiplier is used for realizing the frequency multiplication of fundamental frequency light and has the functions of power regulation and polarization analysis; the frequency locking system can realize the locking of the fundamental frequency light. The frequency multiplicationsystem has the advantages of tunability, narrow linewidth, high power and long-term locking stability, and can be used for cold atom physical and quantum precision measurement.

Description

technical field [0001] The invention belongs to the technical field of laser frequency doubling, in particular to a 452nm frequency doubling system with adjustable power and deflection detection. Background technique [0002] Cold atoms have broad application prospects in fields such as atomic interferometers, atomic clocks, quantum communications, and quantum computing. Using short-wavelength light to capture and manipulate atoms is playing an increasingly important role in physics. In recent decades of development, the output wavelengths of semiconductor lasers are mainly in the near-infrared and mid-to-far infrared bands, and there are still some constraints in terms of operating life, output power, and beam quality in terms of short wavelengths. Although commercial 400-nm laser diodes are available for external-cavity diode lasers, low power and poor transverse membrane shape limit their use in cold-atom experiments. Second harmonic generation (SHG) is a typical nonline...

AI Technical Summary

Problems solved by technology

Although commercial 400nm laser diodes are available for external cavity diode lasers, low power and poor transverse membrane shape limit their use in cold-atom experiments

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