Transparent laser drive current update for burst mode fiber opti

Details Transparent laser drive current update for burst mode fiber opti Transparent laser drive current update for burst mode fiber opti

1986-02-24

1988-01-05

Griffin, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455607, 455618, H04B 900

Patent

active

047181184

ABSTRACT:
A burst mode fiber optic or light-wave communication system uses as a transmitter a light emitting device requiring drive current to produce a light output. The characteristics of the light emitting device change with time, so the drive current must be periodically adjusted. In a high speed burst data system, the magnitude of the light output and the new value of drive current cannot be determined until a time well after the beginning of the burst, or possibly after the burst has ended. If the drive current is adjusted to a new value during burst transmission, the change in light output may be interpreted by a receiver as a data transition, which may result in data errors. The change in the control signal which controls the magnitude of the drive signal is delayed until a time between data bursts, whereby the drive current magnitude remains constant during any burst transmission.

REFERENCES:
patent: 4009385 (1977-02-01), Sell
patent: 4019048 (1977-04-01), Maione et al.
patent: 4355395 (1982-10-01), Salter et al.
patent: 4385387 (1983-05-01), Trimmel
patent: 4523089 (1985-06-01), Maeda et al.
patent: 4558465 (1985-12-01), Siegel et al.
patent: 4580044 (1986-04-01), Hongo et al.
patent: 4592057 (1986-05-01), Comerford
patent: 4612617 (1986-09-01), Giles

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