In accordance with the invention, a passively temperature-compensated tunable optical grating device comprises a grating, which is fixed at both ends to a support frame, and is mechanically or magnetically flexed so that a tensile strain induced in the grating reconfigures the resonant wavelength of...http://www.google.fr/patents/US6148128?utm_source=gb-gplus-shareBrevet US6148128 - Passively temperature-compensated wavelength-tunable device comprising flexed optical gratings and communication systems using such devices
