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.
