Low-power, stabilized, photonic modulator system

Details Low-power, stabilized, photonic modulator system Low-power, stabilized, photonic modulator system

1995-02-09

1996-01-30

Hellner, Mark

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359187, G02F 1225

Patent

active

054885035

ABSTRACT:
A simple, low-power feedback control loop is arranged to set the operating point of a photonic intensity modulator. The loop includes photodetectors which are respectively illuminated with a sample of the carrier signal into the modulator and the modulated signal out of the modulator. A comparison network develops an error signal which is integrated and applied to the voltage modulating port of the modulator. The comparison network includes voltage dividers for adjusting the transfer function operating point of the modulator. The control loop is especially suited for stabilizing Mach-Zehnder and directional coupler modulators.

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