Patent ID: 6807204
Filing Date: 2004-10-19
Classification: G02B,H01S

Abstract:
A method of characterising a hybrid optoelectronic device comprising a tunable multi-section laser (1100), having front, gain, phase and back sections; hybridised with an optical filter (1110) for transmitting a proportion of power of an incident light beam emitted by the laser, the proportion being substantially linearly and monotonically dependent on the wavelength of the incident light beam, the method including the steps of: a) applying constant currents to the gain and phase sections such that the laser emits laser radiation; b) applying back and front currents in step-wise increments to the back and front sections respectively; c) measuring power output by the laser to determine values of front and back currents for which the laser emits radiation at wavelengths remote from mode boundaries of the laser; d) measuring the proportion of power transmitted by the filter to measure the wavelength of the emitted radiation; and e) storing in a look-up table the values of front and back current for which the laser emits radiation at wavelengths remote from mode boundaries and the corresponding wavelengths of the radiation.