Patent ID: 7863894

Claim:
An optics cell for a miniature nuclear magnetic resonance (NMR) gyroscope, comprising: an optical signal source arranged to provide an optical signal; a beamsplitter arranged to split the optical signal into a pump beam that passes through the beamsplitter in a pump beam optical path and a detection beam that is reflected by the beamsplitter in a detection beam optical path; a quarter wave plate arranged such that the pump beam is incident thereon; a pair of mirrors arranged to direct the pump beam so that the pump beam and the detection beam optical paths intersect in an NMR cell region after the pump beam has propagated through the quarter wave plate; a first photodetector arranged to detect the pump beam after the pump beam has exited the NMR cell region; a detector polarizer arranged such that the detection beam is incident thereon after the detection beam has exited the NMR cell region; and a second photodetector arranged to detect the detection beam after it propagates through the detector polarizer.