01 Jul 2008 This product integrates the Volume Holographic Grating (VHG) in a fast-axis collimation lens (FAC). Volume Holographic Gratings (VHG’s) provide the capability of narrowing and stabilizing the wavelength of semiconductor lasers by forming an external cavity laser (ECL). The standard configuration of these ECL’s is to use a collimating lens followed by the VHG to provide feedback to the resonator and lock the wavelength. In this configuration both elements have to be carefully aligned.
Besides the advantage of having only a single element, the integrated element is also less sensitive to alignment tolerances. | 
