US 11,681,167 B2
Optoelectronic device and array thereof
Abu Thomas, Oak Park, CA (US); Albert Benzoni, South Pasadena, CA (US); Jacob Levy, Sierra Madre, CA (US); Thomas Pierre Schrans, Temple City, CA (US); Andrea Trita, Pasadena, CA (US); Guomin Yu, Glendora, CA (US); and Aaron John Zilkie, Pasadena, CA (US)
Assigned to Rockley Photonics Limited, Altrincham (GB)
Filed by ROCKLEY PHOTONICS LIMITED, Altrincham (GB)
Filed on Jun. 16, 2021, as Appl. No. 17/349,835.
Application 17/349,835 is a continuation in part of application No. 17/199,352, filed on Mar. 11, 2021, abandoned.
Application 17/199,352 is a continuation of application No. 17/098,290, filed on Nov. 13, 2020, abandoned.
Application 17/098,290 is a continuation of application No. 16/985,008, filed on Aug. 4, 2020, abandoned.
Application 16/985,008 is a continuation of application No. 16/375,797, filed on Apr. 4, 2019, abandoned.
Claims priority of application No. 1805782 (GB), filed on Apr. 6, 2018.
Prior Publication US 2021/0311333 A1, Oct. 7, 2021
Int. Cl. G02F 1/01 (2006.01); G02F 1/017 (2006.01); H01S 5/00 (2006.01); H01S 5/026 (2006.01); H01S 5/10 (2021.01); G02F 1/025 (2006.01); G02B 6/12 (2006.01); H01S 5/343 (2006.01); H01S 5/12 (2021.01); H01S 5/50 (2006.01); H01S 5/227 (2006.01); G02F 1/015 (2006.01)
CPC G02F 1/01708 (2013.01) [G02B 6/12004 (2013.01); G02F 1/025 (2013.01); H01S 5/0085 (2013.01); H01S 5/026 (2013.01); H01S 5/0265 (2013.01); H01S 5/101 (2013.01); G02F 1/0157 (2021.01); G02F 2202/102 (2013.01); G02F 2203/70 (2013.01); H01S 5/12 (2013.01); H01S 5/227 (2013.01); H01S 5/34306 (2013.01); H01S 5/50 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A photonic chip, comprising:
a waveguide; and
an electro-absorption modulator comprising the waveguide,
the waveguide having:
a first end at a first edge of the photonic chip; and
a second end at the first edge of the photonic chip,
the waveguide having, at a point between the first end and the second end, a curvature having a magnitude greater than 5/mm, and
the waveguide having, everywhere between the first end and the second end, a rate of change of curvature having a magnitude not exceeding 2,000/mm2,
wherein:
the waveguide has a first facet at the first end, and a second facet at the second end;
the first facet is:
oblique to the waveguide at the first end, and
oblique to the first edge,
a fundamental mode of the waveguide at the first end corresponds to a first free space beam outside the first facet, the first free space beam having a first centerline;
a fundamental mode of the waveguide at the second end corresponds to a second free space beam outside the second facet, the second free space beam having a second centerline; and
the first centerline is within 10 degrees of being parallel to the second centerline.