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US 6,659,659 B1Granted
High-speed optical sub-assembly utilizing ceramic substrate, direct coupling and laser welding
AssigneeOptical Communication Products, Inc.
InventorKevin J. Malone
Life of this patent
Estimating the term…
Abstract
An optical subassembly (OSA) includes a ferrule, an optical fiber, a ceramic substrate, and a seal coupled to the ceramic substrate. A weld sleeve is used to fixably couple the ferrule to the seal ring, for which the weld sleeve may be laser welded to the ferrule and/or the seal ring. The OSA may be a transmitter OSA or a receiver OSA, and may be hermetically sealed.
Claims24
An optical subassembly (OSA) comprising:
- a ferrule;
- an optical fiber disposed within the ferrule;
- a ceramic substrate;
- a seal coupled to the ceramic substrate;
- and
- a weld sleeve coupled to the seal and the ferrule.
3 more elements
An optical subassembly (OSA) comprising:
- a ferrule having a substantially cylindrical shape;
- a weld sleeve comprising a substantially cylindrical member, which is co-axial to and at least partially envelopes the ferrule, said weld sleeve further comprising a flange on one end, wherein the weld sleeve is capable of being laser welded to the ferrule;
- a microwave-capable ceramic substrate;
- and
- a seal mounted on the microwave-capable ceramic substrate, said seal capable of being laser welded to the flange.
2 more elements
A transmitter optical subassembly (TOSA) comprising:
- a ceramic substrate;
- a VCSEL mounted on the ceramic substrate, the VCSEL positioned to emit light substantially perpendicular to the surface of the ceramic substrate on which the VCSEL is mounted;
- a ferrule:
- and
- an optical fiber disposed within the ferrule, the ferrule positioned such that an end face of the optical fiber receives light emitted by the VCSEL, said end face of said optical fiber proximate an emitter surface of said VCSEL.
2 more elements
A method of assembling an optical subassembly (OSA), the method comprising:
- coarsely aligning an optical fiber with a VCSEL in at least an X-Y direction, wherein the optical fiber is hermetically sealed to a ferrule and the VCSEL is mounted on a ceramic substrate, said ceramic substrate having a seal mounted thereon;
- adjusting a distance between the optical fiber and the VCSEL in a z direction until sufficient coupling efficiency is achieved;
- sliding a weld sleeve over the ferrule to position the weld sleeve on the seal ring;
- laser welding the weld sleeve to the ferrule, thereby fixing a distance between the optical fiber and the VCSEL in the Z direction;
- finely aligning the optical fiber to the VCSEL in at least the X-Y direction;
- and
- laser welding the weld sleeve to the seal ring.
4 more elements
Dependencies are inferred from the claim text.