| 摘要 |
Optical system (200), which control interference pattern (150) of combined grating (100), by controling difference illuminations of beams (132, 134) on grating. Optical fiber (202) guides and emits beams toward leans (204) that converts beam to parallel beam. Beam is the information carrier beam used in optical communication. Reflector (206) receives beam and reflects beam toward attentuator, which transmits beam toward transparent block (104). Beam enters block without direction change and propagates in block toward grating layer (106) of combined grating.
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