Fiber-Optic Phase Modulators
Fiber-Optic Phase Modulators
Newport's fiber-optic phase modulators provide phase modulation in a broad operation bandwidth with a low driving voltage. They have a low insertion loss for maximum transmission power. They use Annealed Proton Exchange (APE) optical waveguides and polarization-maintaining input and output fibers, making it easy to integrate with other optical components.
- Low Insertion Loss
- Broad Bandwidth
- Up to 20 GHz Modulation Speed See All Features
| Compare | Description | Drawings, CAD & Specs | Avail. | Price | ||
|---|---|---|---|---|---|---|
 | M-PY-1550 | In Stock |
Specifications
- TypePhase Modulator
Features
What is the Pockel's Effect?
Both our phase and our amplitude modulators are based upon the Pockel's effect: the electro-optic effect where the refractive index along one or more axes is proportional to an externally applied electric field. Therefore, by applying a voltage across the electrodes of an electro-optic crystal, you can change the phase of light as it passes through the crystal. By placing the crystal between crossed polarizers, this phase modulation can be converted into amplitude modulation.
Annealed Proton Exchange (APE) Fabrication
Proton Exchange (PE) is one of the common waveguide fabrication techniques in lithium niobate. Compared with Ti in-diffusion, another fabrication method, it can generate higher extraordinary refractive index changes (Δne close to 0.1). A subsequent annealing in a controlled atmosphere, hense called Annealed Proton Exchange (APE), permits a high polarization rejection and a high optical power handling capability, especially for applications using a shorter wavelength than in telecommunications. The annealing, in fact, helps in recovering the nonlinear coefficients that are compromised by standard PE processing.
