公开(公告)号：US20230094833A1

公开(公告)日：2023-03-30

申请号：US17851252

申请日：2022-06-28

Applicant: Apple Inc.

Inventor： Yi-Kuei Wu

IPC: G02B27/10

Abstract: Configurations for a light splitting device used for light splitting over an operating bandwidth of wavelengths are disclosed. The light splitting device may include a first coupler and a second coupler, where the first coupler has a first splitting power relationship and the second coupler has a second splitting power relationship and the first and second splitting power relationships are complementary to one another over the operating bandwidth of wavelengths. The light splitting device may further include a phase delay positioned between the first and second couplers. The phase delay may result in the output light having an approximately even optical power distribution across the operating bandwidth of wavelengths. In some embodiments, the first and second couplers may be directional couplers and, in other embodiments, the first and second couplers may be tapered couplers.

公开(公告)号：US20230062578A1

公开(公告)日：2023-03-02

申请号：US17827281

申请日：2022-05-27

Applicant: Apple Inc.

Inventor： Mohamed Mahmoud ,  Yi-Kuei Wu ,  Lucia Gan

IPC: G02B6/293

Abstract: Configurations for an optical device used for light splitting and wavelength locking are disclosed. The optical device may be a two by three coupler with a first waveguide coupled to a second waveguide, and a third waveguide coupled to the second waveguide. The first and third waveguides may receive input light and optically couple light to the second waveguide. The output signals of the first, second, and third waveguides may have a constant phase difference from one another over a broadband wavelength range, which may allow for phase unwrapping. By phase unwrapping the output signals over an FSR and performing further phase unwrapping over the broadband wavelength range, a continuous signal may be produced and used to sequentially lock each wavelength of light emitted by light sources over the broadband wavelength range.

公开(公告)号：US11500154B1

公开(公告)日：2022-11-15

申请号：US17073393

申请日：2020-10-18

Applicant: Apple Inc.

Inventor： Yi-Kuei Wu ,  Yongming Tu ,  Alfredo Bismuto ,  Andrea Trita ,  Yangyang Liu

IPC: G02B6/122 ,  G02B6/12 ,  G02B27/10

Abstract: A waveguide structure and a method for splitting light is described. The method may include optically coupling a first waveguide and a second waveguide, where the optical coupling may be wavelength insensitive. The widths of the first and second waveguides may be non-adiabatically varying and the optical coupling may be asymmetric between the first and second waveguides. A gap between the first and second waveguides may also be varied non-adiabatically and the gap may depend on the widths of the first and second waveguides. The optical coupling between the first and second waveguides may also occur in the approximate wavelength range of 800 nanometers to 1700 nanometers.