Calibration of laser systems

Details Calibration of laser systems Calibration of laser systems

2005-08-16

2008-07-15

Owens, Douglas W. (Department: 2821)

Coherent light generators

Particular component circuitry

Controlling current or voltage to laser

C372S038100, C372S038020, C372S029010, C372S029015

Reexamination Certificate

active

07400662

ABSTRACT:
A method for determining a condition of the laser system includes determining a change in a laser current from an initial value. A method for measuring a laser current includes determining a difference between the values of a power supply current, which is the value of the laser current. A method for measuring a transmitted power includes generating a first control signal that sets a magnitude of a bias current supplied to a laser, generating a second control signal that sets a of a modulation current supplied to the laser, and determining a difference between values of a high and a low transmitted powers. A method for measuring a received optical power includes determining a received OMA corresponding to the power signal, which is the transmitted OMA minus a known loss through a calibration fiber that couples the laser transmitter to the laser receiver.

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