公开(公告)号：US09893487B2

公开(公告)日：2018-02-13

申请号：US15018575

申请日：2016-02-08

Applicant: RANOVUS INC.

Inventor： Bin Cao ,  Dylan Logan ,  Douglas J. S. Beckett ,  Rong Chen ,  Andrew Peter Knights

IPC: H01S3/102 ,  H01S3/083

CPC classification number: H01S3/1028 ,  G02F1/011 ,  G02F1/0121 ,  G02F1/0147 ,  G02F2203/15 ,  G02F2203/21 ,  H01S3/083

Abstract: A device and method for tuning a ring resonator using self-heating stabilization is provided. A light source is controlled to produce an optical signal, input to an optical ring resonator, at a power where self-heating shifts a resonance wavelength of the optical ring resonator by at least 10 picometers, the self-heating comprising absorption in the optical ring resonator of optical power from a received optical signal. Prior to using the optical ring resonator at least one of modulate and filter the optical signal at the optical ring resonator, a heater of the optical ring resonator is controlled to an operating temperature at which the resonance wavelength of the optical ring resonator is greater than a respective wavelength of the optical signal.

公开(公告)号：US10236657B2

公开(公告)日：2019-03-19

申请号：US15892562

申请日：2018-02-09

Applicant: RANOVUS INC.

Inventor： Bin Cao ,  Dylan Logan ,  Douglas J. S. Beckett ,  Rong Chen ,  Andrew Peter Knights

IPC: H01S3/083 ,  H01S3/102

Abstract: A device and method for tuning a ring resonator using self-heating stabilization is provided. A light source is controlled to produce an optical signal, input to an optical ring resonator, at a power where self-heating shifts a resonance wavelength of the optical ring resonator by at least 10 picometers, the self-heating comprising absorption in the optical ring resonator of optical power from a received optical signal. Prior to using the optical ring resonator at least one of modulate and filter the optical signal at the optical ring resonator, a heater of the optical ring resonator is controlled to an operating temperature at which the resonance wavelength of the optical ring resonator is greater than a respective wavelength of the optical signal.

公开(公告)号：US11646540B2

公开(公告)日：2023-05-09

申请号：US16986513

申请日：2020-08-06

Applicant: RANOVUS INC.

Inventor： Bin Cao

IPC: H01S3/00 ,  G02B26/02 ,  H01S3/063

CPC classification number: H01S3/005 ,  G02B26/02 ,  H01S3/063

Abstract: Variable optical attenuator assisted control of optical devices is provided. A device comprises: an uncooled laser and ring resonator modulator, an optical waveguide configured convey an optical signal of the laser from an input to an output, a heater that heats the ring resonator modulator, a variable optical attenuator that attenuates the optical signal on the optical waveguide, one or more power monitors and a controller. The controller is configured to: in response to determining that one or more of: heater power overhead is unavailable to reduce heater power for laser wavelength tracking; and the heater power is at or below a given lower heater power; and determining that that laser current is increased to assist with ring resonator modulator control for the laser wavelength tracking: control, using the one or more power monitors, attenuation of the VOA to control the output power into a target output power range.