An apparatus and method for use in an optical system. An in-line optical wavelength reference and control module (WRCM) is inserted in series with an optical fiber signal path between an input fiber and an output fiber. The WRCM includes an input lens, a multi-element grating and an output lens....http://www.google.fr/patents/US5777763?utm_source=gb-gplus-shareBrevet US5777763 - In-line optical wavelength reference and control module
In-line optical wavelength reference and control module
