公开(公告)号：US20200153202A1

公开(公告)日：2020-05-14

申请号：US16740331

申请日：2020-01-10

Applicant: Apple Inc.

Inventor： Ross M. Audet ,  Mark Alan Arbore ,  Alfredo Bismuto ,  Yves Bidaux ,  Antoine Jean André Müller

IPC: H01S5/0683 ,  H01S5/06 ,  H01S5/12 ,  H01S5/125 ,  H01S5/024 ,  H01S5/026 ,  H01S5/14

Abstract: Methods for driving a tunable laser with integrated tuning elements are disclosed. The methods can include modulating the tuning current and laser injection current such that the laser emission wavelength and output power are independently controllable. In some examples, the tuning current and laser injection current are modulated simultaneously and a wider tuning range can result. In some examples, one or both of these currents is sinusoidally modulated. In some examples, a constant output power can be achieved while tuning the emission wavelength. In some examples, the output power and tuning can follow a linear relationship. In some examples, injection current and tuning element drive waveforms necessary to achieve targeted output power and tuning waveforms can be achieved through optimization based on goodness of fit values between the targeted and actual output power and tuning waveforms.