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US 7,352,923 B2Granted
Bidirectional photonic integrated circuit-based subsystem
OwnerMohammad A. Mazedinventor
Life of this patent
Estimating the term…
Abstract
A reconfigurable intelligent subsystem may include a bidirectional photonic integrated circuit. The bidirectional photonic integrated circuit may include a distributed reflector (DR) laser or a distributed feedback laser (DFB) that emits light of a first wavelength, and a longitudinal waveguide portion that transmits light of a second wavelength, while attenuating light of the first wavelength. The bidirectional photonic integrated circuit may be coupled to a single mode optical fiber to provide two-way optical communication between a service provider (“headend”) and a subscriber.
Claims34
A subsystem, comprising:
- a receptacle for an optical fiber;
- a photonic integrated circuit including a waveguide, the photonic integrated circuit transmitting in the optical fiber an optical signal of a first wavelength and receiving from the optical fiber an optical signal of a second wavelength;
- and
- a standalone photodiode, wherein the standalone photodiode and the photonic integrated circuit are encapsulated inside an optical module such that the photodiode is positioned adjacent to one end of the photonic integrated circuit at an angle relative to a direction of light transmission in the waveguide to receive from the waveguide the optical signal of the second wavelength.
1 more element
A optical package comprising:
- a first substrate for mounting a photonic integrated circuit, the photonic integrated circuit including a laser and a waveguide for providing laser energy to an optical fiber and for receiving laser energy from the optical fiber;
- a second substrate for mounting a standalone back-illuminated photodiode, the second substrate being positioned in the optical package in a substantially orthogonal orientation to the first substrate to allow the photodiode to detect the laser energy received from the external fiber;
- and
- signal processing circuits mounted on the second substrate for processing laser energy detected by the photodiode.
1 more element
Dependencies are inferred from the claim text.