公开(公告)号：US20250102628A1

公开(公告)日：2025-03-27

申请号：US18763961

申请日：2024-07-03

Applicant: Apple Inc.

Inventor： Fei Tan ,  Pengfei Qiao ,  Alexander Hein ,  Chin Han Lin ,  Tong Chen ,  Takashi Hosoda ,  Arnaud Laflaquiere

IPC: G01S7/481 ,  G01S17/89 ,  H01S5/11 ,  H01S5/183 ,  H01S5/34 ,  H01S5/42

Abstract: Disclosed herein are self-mixing interference (SMI) sensors, frequency modulated continuous wave (FMCW) sensors, and electronic devices that include SMI and FMCW sensors. Both types of sensors include a photonic crystal surface-emitting laser diode. The SMI sensors include a photonic crystal surface-emitting laser diode configured to undergo SMI between a primary emitted light from the photonic crystal surface-emitting laser diode and reflections thereof from an object. The SMI sensor includes a photodetector configured to receive a secondary light emission from the photonic crystal surface-emitting laser diode and detect a parameter related to the SMI, from which distance or motion to the object may be inferred. The FMCW sensors include a photonic crystal surface-emitting laser diode configured to emit a primary light emission toward the object and a secondary light emission toward a light beam combiner. The light beam combiner also receives reflections from the object and detects distances and/or motion of the object based on the frequency modulations of the two light beams.