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公开(公告)号：US11158996B2
公开(公告)日：2021-10-26
申请号：US16649965
申请日：2018-09-25
申请人： Apple Inc.
发明人： Alfredo Bismuto , Mark Alan Arbore , Ross M. Audet
摘要： A laser chip including a plurality of stripes is disclosed, where a laser stripe can be grown with an initial optical gain profile, and its optical gain profile can be shifted by using an intermixing process. In this manner, multiple laser stripes can be formed on the same laser chip from the same epitaxial wafer, where at least one laser stripe can have an optical gain profile shifted relative to another laser stripe. For example, each laser stripe can have a shifted optical gain profile relative to its neighboring laser stripe, thereby each laser stripe can emit light with a different range of wavelengths. The laser chip can emit light across a wide range of wavelengths. Examples of the disclosure further includes different regions of a given laser stripe having different intermixing amounts.
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公开(公告)号：US10535979B2
公开(公告)日：2020-01-14
申请号：US16282176
申请日：2019-02-21
申请人： Apple Inc.
IPC分类号： H01S5/0683 , H01S5/06 , H01S5/12 , H01S5/125 , H01S5/024 , H01S5/026 , H01S5/14 , H01S5/0625 , H01S5/0687 , H01S5/227 , H01S5/022
摘要： 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.
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公开(公告)号：US20240113508A1
公开(公告)日：2024-04-04
申请号：US18244752
申请日：2023-09-11
申请人： Apple Inc.
发明人： Alfredo Bismuto , Mark Alan Arbore , Ross M. Audet
CPC分类号： H01S5/4087 , H01S5/04256 , H01S5/162 , H01S5/2059 , H01S5/2228 , H01S5/3414
摘要： A laser chip including a plurality of stripes is disclosed, where a laser stripe can be grown with an initial optical gain profile, and its optical gain profile can be shifted by using an intermixing process. In this manner, multiple laser stripes can be formed on the same laser chip from the same epitaxial wafer, where at least one laser stripe can have an optical gain profile shifted relative to another laser stripe. For example, each laser stripe can have a shifted optical gain profile relative to its neighboring laser stripe, thereby each laser stripe can emit light with a different range of wavelengths. The laser chip can emit light across a wide range of wavelengths. Examples of the disclosure further includes different regions of a given laser stripe having different intermixing amounts.
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公开(公告)号：US20220006267A1
公开(公告)日：2022-01-06
申请号：US17478670
申请日：2021-09-17
申请人： Apple Inc.
发明人： Alfredo Bismuto , Mark Alan Arbore , Ross M. Audet
摘要： A laser chip including a plurality of stripes is disclosed, where a laser stripe can be grown with an initial optical gain profile, and its optical gain profile can be shifted by using an intermixing process. In this manner, multiple laser stripes can be formed on the same laser chip from the same epitaxial wafer, where at least one laser stripe can have an optical gain profile shifted relative to another laser stripe. For example, each laser stripe can have a shifted optical gain profile relative to its neighboring laser stripe, thereby each laser stripe can emit light with a different range of wavelengths. The laser chip can emit light across a wide range of wavelengths. Examples of the disclosure further includes different regions of a given laser stripe having different intermixing amounts.
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公开(公告)号：US11777279B2
公开(公告)日：2023-10-03
申请号：US17478670
申请日：2021-09-17
申请人： Apple Inc.
发明人： Alfredo Bismuto , Mark Alan Arbore , Ross M. Audet
CPC分类号： H01S5/4087 , H01S5/04256 , H01S5/162 , H01S5/2059 , H01S5/2228 , H01S5/3414
摘要： A laser chip including a plurality of stripes is disclosed, where a laser stripe can be grown with an initial optical gain profile, and its optical gain profile can be shifted by using an intermixing process. In this manner, multiple laser stripes can be formed on the same laser chip from the same epitaxial wafer, where at least one laser stripe can have an optical gain profile shifted relative to another laser stripe. For example, each laser stripe can have a shifted optical gain profile relative to its neighboring laser stripe, thereby each laser stripe can emit light with a different range of wavelengths. The laser chip can emit light across a wide range of wavelengths. Examples of the disclosure further includes different regions of a given laser stripe having different intermixing amounts.
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公开(公告)号：US20230163573A1
公开(公告)日：2023-05-25
申请号：US18094797
申请日：2023-01-09
申请人： Apple Inc.
IPC分类号： H01S5/40 , H01S5/024 , G01J3/10 , H01S5/02 , H01S5/125 , H01S5/068 , H01S5/026 , H01S5/0625 , H01S5/02325
CPC分类号： H01S5/4087 , H01S5/02453 , G01J3/10 , H01S5/0206 , H01S5/125 , H01S5/06804 , H01S5/021 , H01S5/0261 , H01S5/06256 , H01S5/02325
摘要： Integrated laser sources emitting multi-wavelengths of light with reduced thermal transients and crosstalk and methods for operating thereof are disclosed. The integrated laser sources can include one or more heaters and a temperature control system to maintain a total thermal load of the gain segment, the heater(s), or both of a given laser to be within a range based on a predetermined target value. The system can include electrical circuitry configured to distribute current to the gain segment, the heater(s), or both. The heater(s) can be located proximate to the gain segment, and the distribution of current can be based on the relative locations. In some examples, the central laser can be heated prior to being activated. In some examples, one or more of the plurality of lasers can operate in a subthreshold operation mode when the laser is not lasing to minimize thermal perturbations to proximate lasers.
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公开(公告)号：US11552454B1
公开(公告)日：2023-01-10
申请号：US16142676
申请日：2018-09-26
申请人： Apple Inc.
IPC分类号： H01S5/024 , H01S5/40 , G01J3/10 , H01S5/02 , H01S5/125 , H01S5/068 , H01S5/026 , H01S5/0625 , H01S5/02325
摘要： Integrated laser sources emitting multi-wavelengths of light with reduced thermal transients and crosstalk and methods for operating thereof are disclosed. The integrated laser sources can include one or more heaters and a temperature control system to maintain a total thermal load of the gain segment, the heater(s), or both of a given laser to be within a range based on a predetermined target value. The system can include electrical circuitry configured to distribute current to the gain segment, the heater(s), or both. The heater(s) can be located proximate to the gain segment, and the distribution of current can be based on the relative locations. In some examples, the central laser can be heated prior to being activated. In some examples, one or more of the plurality of lasers can operate in a subthreshold operation mode when the laser is not lasing to minimize thermal perturbations to proximate lasers.
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公开(公告)号：US11469570B2
公开(公告)日：2022-10-11
申请号：US16740331
申请日：2020-01-10
申请人： Apple Inc.
IPC分类号： H01S5/0683 , H01S5/06 , H01S5/12 , H01S5/125 , H01S5/024 , H01S5/026 , H01S5/14 , H01S5/0625 , H01S5/0687 , H01S5/227 , H01S5/0234
摘要： 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.
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公开(公告)号：US11437779B2
公开(公告)日：2022-09-06
申请号：US15570683
申请日：2016-04-27
申请人： Apple Inc.
发明人： Ross M. Audet , Mark Alan Arbore , Alfredo Bismuto , Yves Bidaux , Camille Tardy , Tobias Gresch , Antoine Jean André Müller
IPC分类号： H01S5/0625 , H01S5/125 , H01S5/12 , H01S5/06 , H01S5/0683 , H01S5/34
摘要： 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.
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公开(公告)号：US20200244045A1
公开(公告)日：2020-07-30
申请号：US16649965
申请日：2018-09-25
申请人： Apple Inc.
发明人： Alfred Bismuto , Mark Alan Arbore , Ross M. Audet
摘要： A laser chip including a plurality of stripes is disclosed, where a laser stripe can be grown with an initial optical gain profile, and its optical gain profile can be shifted by using an intermixing process. In this manner, multiple laser stripes can be formed on the same laser chip from the same epitaxial wafer, where at least one laser stripe can have an optical gain profile shifted relative to another laser stripe. For example, each laser stripe can have a shifted optical gain profile relative to its neighboring laser stripe, thereby each laser stripe can emit light with a different range of wavelengths. The laser chip can emit light across a wide range of wavelengths. Examples of the disclosure further includes different regions of a given laser stripe having different intermixing amounts.
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