Multi-wavelength external-cavity laser with digital and mode-hope-free fine tuning mechanisms

摘要: An apparatus for electronically tuning of a single or multi-wavelength external-cavity laser, comprising: an AR-coated diode collimator, liquid crystal cell, dispersion grating, focusing lens and pixel mirror. Wavelength channels can be selected by opening the appropriate pixels By turning on several at same time, laser generate output wavelengths. switching between is also possible. Laser wavelength further tuned varying driving voltages cell The mirror in cavity combined to form sandwich-type that allows both step (digital) fine wavelength.