Reduced noise wavelength locker module

摘要

Numerous features may be incorporated into a wavelength locker to reduce the noise inherent therein. These features may be used in any combination thereof. These features include avoiding the use of reflectors, using a diffractive splitter which outputs evanescent beams for diffractive orders greater than one, using anti-reflective coatings, using an opaque material with through holes for the light, and designing the wavelength locker to be used at a tilt