Resonant Phase Modulator

Resonant Phase Modulator

A phase modulator is a modulation device built upon the electro-optic effect and high-frequency resonant theory, capable of imposing phase modulation on polarized light. It finds widespread application in high-precision optical systems, including laser interferometry, optical frequency combs, laser frequency stabilization, atomic cooling, and quantum state manipulation.

Upon injecting a radio-frequency electrical signal into the high‑frequency resonant cavity, electromagnetic waves undergo multiple reflections within the cavity to form a standing wave and establish electromagnetic resonance. Driven by this resonant field, the electro‑optic crystal exhibits a dynamic birefringence response, which precisely modulates the phase of the transmitted optical beam.

Tuniu’s phase modulators feature a selection of high-performance electro-optic crystals including MLN, DKDP, KTP, and LT. With an operating wavelength range from 350 nm to 3000 nm and a modulation frequency bandwidth covering 1–4 GHz, the devices deliver a maximum modulation depth of up to 2π rad.

Model

Parameter Example

* The beam diameter is recommended to be less than 70% of the clear aperture.