COUPLING DEVICE HAVING A STAMPED STRUCTURED SURFACE FOR ROUTING OPTICAL DATA SIGNALS
An optical coupling device for routing optical signals for use in an optical communications module, in which defined on a base are a structured surface having a surface profile that reshapes and/or reflect an incident light, and an alignment structure defined on the base, configured with a surface feature to facilitate positioning an optical component on the base in optical alignment with the structured surface to allow light to be transmitted along a defined path between the structured surface and the optical component. The structured surface and the alignment structure are integrally defined on the base by stamping a malleable material of the base. The alignment structure facilitates passive alignment of the optical component on the base in optical alignment with the structured surface to allow light to be transmitted along a defined path between the structured surface and the optical component. The structured surface has a reflective surface profile, which reflects and/or reshape incident light.
1 . A stamped metal optic for use in an optical communications module, the stamped metal optic comprising:
a unitary, or integrally formed, metal body comprising:
a bench upon which at least one optoelectronic device is mounted in an aligned position; and
a reflector integrally connected to the bench and optically aligned with said aligned position such that an optical axis of the optoelectronic device is in optical alignment with an optical axis of the reflector.
2 . The stamped metal optic of clam 1 , wherein the reflector is aspherical in shape.
3 . The stamped metal optic of claim 2 , wherein said at least one optoelectronic device is a laser diode that emits a diverging light beam that is incident on the reflector, and wherein the reflector collimates the diverging light beam into a collimated light beam and reflects the collimated light beam by a nonzero angle relative to an angle of incidence of the diverging light beam on the reflector.
4 . The stamped metal optic of claim 3 , wherein the nonzero angle is between about 70° and about 110°.
5 . The stamped metal optic of claim 4 , wherein the nonzero angle is about 90°.
6 . The stamped metal optic of claim 1 , further comprising:
at least a first ball lens seat formed in the unitary metal body in between the aligned position of the optoelectronic device and the reflector; and at least a first ball lens seated in and fixedly secured to the first ball lens seat, and wherein the reflector is flat in shape, and wherein said at least one optoelectronic device is a laser diode that emits a diverging light beam that is incident on the first ball lens, and wherein the first ball lens collimates the diverging light beam into a collimated light beam and directs the collimated light beam onto the reflector, and wherein the reflector reflects the collimated light beam by a non-zero angle relative to an angle of incidence of the diverging light beam on the reflector.
7 . The stamped metal optic of claim 1 , wherein the unitary metal body further comprises:
at least a first fiduciary mark formed in the bench adjacent said aligned position of the optoelectronic device.
8 . The stamped metal optic of claim 1 , wherein at least the reflector is gold plated.
9 . The stamped metal optic of claim 1 , wherein said at least one optoelectronic device is a photodiode, and wherein the reflector receives a collimated beam of light directed onto the reflector at an angle of incidence and reflects the collimated light beam by a non-zero angle relative to the angle of incidence onto the photodiode.
10 . The stamped metal optic of claim 9 , wherein the nonzero angle is between about 70° and about 110°.
11 . The stamped metal optic of claim 10 , wherein the non-zero angle is about 90°.
12 . The stamped metal optic of claim 1 , further comprising:
at least a first ball lens seat formed in the unitary metal body in between the aligned position of the optoelectronic device and the reflector; and
at least a first ball lens seated in and fixedly secured to the first ball lens seat, and wherein the reflector is flat in shape, and wherein said at least one optoelectronic device is a photodiode, and wherein the reflector receives a collimated light beam that is incident on the reflector at an angle of incidence and reflects the received collimated light beam onto the first ball lens at a non-zero angle relative to the angle of incidence, and wherein the first ball lens focuses the collimated light beam received thereby onto the photodiode.
13 . The stamped metal optic of claim 12 , wherein the unitary metal body further comprises:
at least a first fiduciary mark form in the bench adjacent said aligned position of the optoelectronic device, the fiducial mark containing alignment information for mounting the optoelectronic device on the bench.
14 . The stamped metal optic of claim 12 , wherein at least the reflector is gold plated.
15 . The stamped metal optic of claim 1 , wherein a plurality of optoelectronic devices are mounted on the bench in respective aligned positions, and wherein the reflector is optically aligned with all of the aligned positions such that respective optical axes of the optoelectronic devices are in optical alignment with optical axes of the reflector.
16 . The stamped metal optic of claim 1 , wherein the optical communications module is an optical transmitter module.
17 . The stamped metal optic of claim 1 , wherein the optical communications module is an optical receiver module.
18 . The stamped metal optic of claim 1 , wherein the optical communications module is an optical transceiver module.
19 . The stamped metal optic of claim 1 , wherein the optical communications module is a transistor-outline (TO) can assembly.
20 . The stamped metal optic of claim 1 , wherein the unitary metal body further comprises:
at least a first passive alignment device formed in the bench for passively aligning the optoelectronic device on the bench in said aligned position.
21 . A method for forming a stamped metal optic for use in an optical communications module, the method comprising:
performing a sheet metal stamping process on a sheet metal work piece to form a plurality of stamped metal optics in the sheet metal work piece, each stamped metal optic comprising:
a unitary, or integrally formed, metal body comprising:
a bench upon which at least one optoelectronic device is mounted in an aligned position; and
a reflector integrally connected to the bench and optically aligned with said aligned position such that an optical axis of the optoelectronic device is in optical alignment with an optical axis of the reflector.
22 . The method of claim 21 , wherein the reflector is aspherical in shape.
23 . The method of claim 21 , further comprising:
mounting at least a first optoelectronic device on the bench.
24 . The method of claim 23 , wherein the unitary metal body further comprises at least a first ball lens seat formed in the unitary metal body in between the aligned position of the optoelectronic device and the reflector, and wherein the method further comprises:
mounting a first ball lens on the first ball lens seat and securing the first ball lens to the first ball lens seat.
25 . The method of claim 21 , further comprising:
performing a shearing process to singulate the stamped metal optics from the sheet metal work piece.
26 . The method of claim 25 , further comprising:
performing a plating process to plate the reflectors of the stamped metal optics with a reflective metal.
27 . The method of claim 26 , wherein the reflective metal is gold.