Patent ID: 9222850
Filing Date: 2015-12-29
Classification: G01M,H01S

Abstract:
1. An apparatus comprising: a single laser source configured to output laser light at a target frequency; a measurement unit configured to measure a deviation between an actual frequency outputted by the single laser source at a current period of time and the target frequency of the laser source, the measurement unit using an interference pattern produced from the laser light from the single laser source to measure the deviation; a feedback control unit configured to, based on the measured deviation between the actual and target frequencies, control the single laser source to maintain a constant frequency of laser output from the single laser source so that the frequency of laser light transmitted from the single laser source is adjusted to the target frequency of the single laser source; and a temperature adjustment component including a magnetic refrigeration material attached to the single laser source, the temperature adjustment component being configured to adjust a temperature of the single laser source controlled by the feedback control unit.