Patent ID: 6697397
Filing Date: 2004-02-24
Classification: H01S

Abstract:
A wavelength compensated automatic level control loop, comprising:an automatic level control circuit comprising a controller; a bandpass filter operably connected in feedback with said automatic level control circuit to prevent crosstalk from sidelobes; a thermoelectric cooler loop operably connected to said automatic level control circuit; and wherein said automatic level control circuit further comprises: an error amplifier having at least two inputs and an output, wherein a first of said inputs is operably connected to an output of said controller; a laser diode operably connected between said on of said error amplifier and said bandpass filter; a photodiode operably connected between said bandpass filter and a second input of said error amplifier; a I/V conversion circuit operably connected between said laser diode and said output of said error amplifier; and an analog-to-digital converter operably connected between said I/V conversion circuit and an input of said controller.