Patent ID: 9142937
Filing Date: 2015-09-22
Classification: G01J,G01K,H01S

Abstract:
1. An optical system comprising: a controller for a laser diode, the controller comprising: a current source for providing a driving current to the laser diode; a voltmeter for measuring a voltage across the laser diode; and a control circuit coupled to the current source and the voltmeter, the control circuit structured and arranged to: cause the current source to supply a first driving current to the laser diode above a lasing threshold of the laser diode to emit light at a first wavelength; cause the current source to supply a second driving current to the laser diode; cause the voltmeter to measure a reference value of a forward-bias voltage across the laser diode when the second driving current is supplied; and compute the first wavelength based on the reference value of the forward-bias voltage.