CPC H04B 10/503 (2013.01) [G02B 6/12007 (2013.01); G02B 6/4246 (2013.01); H01S 5/0262 (2013.01)] | 16 Claims |
1. A system comprising:
an emitter that emits laser light towards a surface;
a receiver that passively receives reflected laser light that is a portion of the laser light reflected from the surface, wherein the receiver has multiple pixels having a size that is smaller than an expected optical speckle size, wherein the expected optical speckle size corresponds to a region on the receiver where the reflected laser light has a substantially uniform spatial phase, wherein the emitter is a diffraction grating emitter, the receiver is a diffraction grating receiver, and the emitter and the receiver are formed on an integrated photonics chip;
a combiner configured to combine optical fields from each pixel in the multiple pixels into an output that supports a number of modes that is equal to a number of pixels in the multiple pixels; and
a photodetector configured to receive light from the output.
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