公开(公告)号：US10763968B1

公开(公告)日：2020-09-01

申请号：US16517151

申请日：2019-07-19

Applicant: Google LLC

Inventor： Wenzao Li ,  Ryohei Urata ,  Xiang Zhou ,  Lieven Verslegers

IPC: H04B10/00 ,  H04B10/50 ,  H04B10/40 ,  H01S3/10 ,  H01S3/106 ,  H01S5/00 ,  H01S3/105 ,  H04J14/00 ,  G02B6/12

Abstract: A dual-mode optical transceiver is disclosed. The dual-mode optical transceiver includes a receiver section configured to receive both coherently modulated and intensity modulated optical signals and to be optically switched between a first receiver mode for direct detection and a second receiver mode for coherent detection, and a transmitter section including a nested Mach-Zehnder Modulator or a polarization multiplexed quad Mach-Zehnder Modulator configured to be operated in a first transmission mode to output an intensity modulated optical signal and a second transmission mode to output a coherently modulated optical signal. In some implementations, the dual-mode optical receiver includes an optical switch configured to selectively direct a received optical signal down a direct detection optical circuit or a coherent detection optical circuit based on a control signal applied to the optical switch.

公开(公告)号：US20190049677A1

公开(公告)日：2019-02-14

申请号：US16164394

申请日：2018-10-18

Applicant: Google LLC

Inventor： Kevin Y. Yasumura ,  Lieven Verslegers ,  Jill D. Berger

IPC: G02B6/42 ,  G02B6/124 ,  G02B6/12

Abstract: An integrated optical assembly includes an optics mount. The optics mount has disposed thereon a light source for providing a beam of light and a lens configured to focus the beam of light. The integrated optical assembly includes a photonic integrated circuit (PIC) mechanically coupled to the optics mount. The PIC has disposed thereon a grating coupler for receiving the beam of light and coupling the beam of light into a waveguide. The integrated optical assembly includes a microelectromechanical systems (MEMS) mirror configured to receive the beam of light from the lens and redirect it towards the grating coupler. A position of a reflective portion of the MEMS mirror is adjustable to affect an angle of incidence of the beam of light on the grating coupler.