Peak optical power control circuit for laser driver
Номер патента: CA1236514A
Опубликовано: 10-05-1988
Автор(ы): Gregory Stephen Burley
Принадлежит: Northern Telecom Ltd
Опубликовано: 10-05-1988
Автор(ы): Gregory Stephen Burley
Принадлежит: Northern Telecom Ltd
Реферат: PEAK OPTICAL POWER CONTROL CIRCUIT FOR LASER DRIVER Abstract of the Disclosure To compensate for variations in a laser's peak power output due to changes in slope efficiency, a feedback loop is provided to monitor light output and effect compensatory changes in the drive current. In the feedback loop, the light output is detected by a photodiode. The output of the photodiode is filtered by a bandpass filter. The mean power of the filtered signal is determined and compared with a reference to control the laser drive. The reference takes account of the relationship between the filtered signal power and the peak power in the frequency spectrum of the pseudo-random input signal. The use of this reduced-bandwidth signal allows a relatively cheap, low bandwidth photodiode to be used with a long-wavelength laser. - i -
Current load-controlled laser driver
Номер патента: US20230387657A1. Автор: Richard Davis,Theron Jones,Michael Yeung,Brian Carey. Владелец: II VI Delaware Inc. Дата публикации: 2023-11-30.