Modulating circuit for semiconductor optical modulator

Details Modulating circuit for semiconductor optical modulator Modulating circuit for semiconductor optical modulator

H - Electricity

04

B

H04B 10/145 (2006.01) G02F 1/01 (2006.01) G02F 1/015 (2006.01)

Patent

CA 2180579

A modulating circuit for a semiconductor optical modulator comprises a driver DC-coupled to an optical modulator, a load resistor connected in parallel to the modulator, and a constant current source connected in parallel to the optical modulator for drawing out the photo-current generated in the optical modulator by absorption of light emitted from a semiconductor laser. The modulating circuit can perform light intensity modulation with low wavelength chirping using a driver DC-coupled to the optical modulator. The drawing out current is approximately equal to or greater than the average photo-current which is generated in the optical modulator by light absorption at the time of modulation.

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