High-lane count optical transceiver with built-in self test
AssigneeJuniper Networkd, Inc.
InventorsJohn Parker, John Garcia, Brandon Gomez, Molly Piels, Anand Ramaswamy
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Abstract
An optical device such as an optical transceiver can include a cascaded built-in self-test structure that can be configured in testing mode using an active power mode and can sufficiently attenuate light away from a loopback path in an inactive power mode. The optical device can include a wafer top emitter that can be used to tune a light source for testing and calibration of optical components while the built-in self-test structure is in active mode.
Claims20
A method for testing an optical transceiver comprising a transmitter and a receiver, the method comprising:
- activating one or more filters to an active power mode to propagate light from the transmitter to the receiver along a loopback path in the optical transceiver;
- testing one or more optical components in the optical transceiver using the light propagated along the loopback path by the one or more filters in the active power mode;
- setting the optical transceiver in mission mode by setting the one or more filters to an inactive power mode such that the one or more filters passively direct light away from the loopback path while in the inactive power mode;
- and
- transmitting, by the transmitter, output light while the optical transceiver is in the mission mode and the one or more filters are in the inactive power mode.
An optical transceiver comprising:
- an optical transmitter configured to generate modulated light;
- an optical receiver to receive light;
- and
- one or more filters that propagate light from the optical transmitter to the optical receiver along a loopback path while the one or more filters are in an active power mode, the one or more filters passively directing light away from the loopback path while in an inactive power mode.
Dependencies are inferred from the claim text.