FIBER-INTEGRATED MICROLENSES AND OPTICAL FIBER BRAGG GRATING COUPLER, AND SPECTROMETER AND MULTIPLEXER ASSEMBLED WITH THE SAME

摘要

According to the invention, a microlens (30) is assembled on the exterior surface of an optical fiber (20), said optical fiber having a fiber Bragg grating (FBG) (23) constructed in its core (21), in order to focus the light diffracted through the fiber Bragg grating (FBG) (23) onto other fibers or optical devices or to focus the light received on the fiber (20) onto the fiber Bragg grating (FBG) (23). Numerous configurations consisting of one or several microlenses (38, 68), with one or several fibers (20) perform various functions such as coupling or splitting signals, spectrography, delay lines with taps, phase matching by means of time delay, circulation memory, etc. The microlenses can use angle-magnifying prisms and may comprise Fresnel lenses.