Optical transceiver module having a front facet reflector and methods for making and using a front facet reflector
AssigneeAvago Technologies Fiber IP (Singapore) Pte. Ltd.
InventorsTak K. Wang, Christopher Coleman
Life of this patent
Estimating the term…
Abstract
A reflector for use in an optical transceiver module and methods for making and using the reflector are provided. The methods for making the reflector reduce the amount of processing and handling of the wafer that are required, thereby reducing manufacturing costs and increasing yield. The reflector may have a diffraction-inducing structure formed thereon such that light received from the light source is redirected in a plurality of directions, including toward a lens that couples light into an end of a transmit fiber and in at least one other direction for being sensed by a detector that converts the detected light into electrical energy.
Claims15
An optical transceiver module comprising:
- a light source configured to receive a modulation signal and to produce an optical data signal based on the received modulation signal;
- a light source driver configured to produce the modulation signal based on an electrical data signal received by the light source driver;
- a reflector, the reflector receiving light corresponding to the optical data signal produced by the light source, the reflector including a mirroring surface and a diffraction-inducing structure, wherein the diffraction-inducing structure is formed on or in the mirroring surface, the mirroring surface reflecting at least a portion of the received light in a first direction, the diffraction-inducing structure diffracting at least a portion of the received light in at least a second direction, the second direction being different from the first direction;
- and
- at least a first detector, the first detector receiving at least a portion of the light diffracted in the second direction and converting the received diffracted light into electrical energy.
A reflector for use in an optical transceiver module, the reflector comprising:
- a mirroring surface;
- a diffraction-inducing structure formed on or in the mirroring surface;
- a mounting surface for mounting the front facet reflector to a submount assembly of an optical transceiver module, the mounting surface being at substantially a 45° angle relative to the mirroring surface;
- and
- wherein light that is incident on the mirroring surface having the diffraction-inducing structure thereon or therein is redirected away from the mirroring surface as +1 order light, 0 order light and −1 order light, the 0 order light corresponding to light that is redirected in a first direction, the first direction being at substantially a 90° angle relative to the mounting surface, the +1 order light corresponding to light that is redirected in a second direction, the second direction being different from the first direction, the −1 order light corresponding to light that is redirected by the diffraction grating in a third direction, the third direction being different from the first and second directions.
A method for directing light in an optical transceiver module, the method comprising:
- providing a reflector in an optical transceiver module and positioning the reflector to receive at least a portion of light produced by a light source of the transceiver module, the reflector having at least a mirroring surface and a mounting surface, the reflector having a diffraction-inducing structure formed on or in the mirroring surface, the mounting surface of the reflector being mounted to a submount assembly of the optical transceiver module, the mounting surface being at substantially a 45° angle relative to the mirroring surface, and wherein the mirroring surface reflects at least a portion of the received light in a first direction, the diffraction-inducing structure diffracting at least a portion of the received light in at least a second direction, the second direction being different from the first direction;
- and
- providing at least a first detector in the optical transceiver module, the first detector receiving at least a portion of the light redirected in the second direction and converting the received redirected light into electrical energy.
Dependencies are inferred from the claim text.