| 摘要 |
LASER DIODE INTENSITY AND WAVELENGTH CONTROL The actual values of intensity and wavelength of the optical signal output from a laser diode are compared to desired values thereof to generate intensity and wavelength error signals. The rates of change of the wavelength and intensity as functions of temperature and injection current about nominal operating values of the temperature and injection current are determined and used to calculate an injection current error signal and a temperature error signal for adjusting the injection current and temperature, respectively. The time responses of the injection current and temperature are decoupled, which allows independent adjustment of the time constants of the exponential expressions for injection current and temperature. Providing independent adjustment of the time constants of the injection current and temperature variations permits the desired signal wavelength and intensity to be obtained in a time efficient manner. |
