-
公开(公告)号：US20190190233A1
公开(公告)日：2019-06-20
申请号：US16282176
申请日：2019-02-21
Applicant: Apple Inc.
Inventor： Ross M. AUDET , Mark Alan ARBORE , Alfredo BISMUTO , Yves BIDAUX , Antoine Jean André MÜLLER
CPC classification number: H01S5/0683 , H01S5/0224 , H01S5/02453 , H01S5/026 , H01S5/0261 , H01S5/0607 , H01S5/0612 , H01S5/06256 , H01S5/06832 , H01S5/0687 , H01S5/12 , H01S5/125 , H01S5/141 , H01S5/227
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.
-
公开(公告)号：US20180183207A1
公开(公告)日：2018-06-28
申请号：US15570683
申请日：2016-04-27
Applicant: Apple Inc.
Inventor： Ross M. AUDET , Mark Alan ARBORE , Alfredo BISMUTO , Yves BIDAUX , Camille TARDY , Tobias GRESCH , Antoine Jean André MÜLLER
IPC: H01S5/0625 , H01S5/125 , H01S5/042 , H01S5/0683 , H01S5/12
CPC classification number: H01S5/06256 , H01S5/0425 , H01S5/0612 , H01S5/06258 , H01S5/06837 , H01S5/1206 , H01S5/1209 , H01S5/1218 , H01S5/125 , H01S5/3401
Abstract: Disclosed is a Vernier effect DBR laser that has uniform laser injection current pumping along the length of the laser. The laser can include one or more tuning elements, separate from the laser injection element, and these tuning elements can be used to control the temperature or modal refractive index of one or more sections of the laser. The refractive indices of each diffraction grating can be directly controlled by temperature changes, electro optic effects, or other means through the one or more tuning elements. With direct control of the temperature and/or refractive indices of the diffraction gratings, the uniformly pumped Vernier effect DBR laser can be capable of a wider tuning range. Additionally, uniform pumping of the laser through a single electrode can reduce or eliminate interfacial reflections caused by, for example, gaps between metal contacts atop the laser ridge, which can minimize multi-mode operation and mode hopping.
-
公开(公告)号：US20180083421A1
公开(公告)日：2018-03-22
申请号：US15555049
申请日：2016-03-04
Applicant: Apple Inc.
Inventor： Ross M. AUDET , Mark Alan ARBORE , Alfredo BISMUTO , Yves BIDAUX , Antoine Jean André MÜLLER
CPC classification number: H01S5/0683 , H01S5/0224 , H01S5/02453 , H01S5/026 , H01S5/0261 , H01S5/0607 , H01S5/0612 , H01S5/06256 , H01S5/06832 , H01S5/0687 , H01S5/12 , H01S5/125 , H01S5/141 , H01S5/227
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.
-
-
Search Results
3
records
(took 0.011 seconds)
