FREE-SPACE BROADBAND PHASE MODULATORS
Traveling-Wave electro-optic Phase modulators (TWP) are devices used in e.g. in quantum science to manipulate the phase of light in order to generate sidebands that can be dynamically tuned over a wide range of frequencies. The basic principle behind electro-optic phase modulation is the electro-optic effect, which is the change in refractive index of a material in response to an applied electric field. This effect allows the phase of light passing through the material to be altered by varying the voltage applied to the modulator.
Broadband phase modulators typically use crystals with high electro-optic coefficients, such as lithium niobate (LiNbO₃). These crystals are known for their strong electro-optic response and wide bandwidth capabilities. The modulator consists of a traveling wave type structure around the crystal that guides the RF-wave and light collinearly (phase matched) through the device.
- laser frequency stabilisation (e.g. Sideband Offset-Lock - SOL)
- laser cooling and trapping of neutral atoms/ions/molecules
- laser frequency dynamic control (e.g. Master-Slave Lock)
- multi-mode laser generation
- quantum state manipulation