Optical transmitter

Details Optical transmitter Optical transmitter

1991-11-27

1994-05-31

Chilcot, Jr., Richard E.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359181, 372 26, H04B 1004

Patent

active

053174437

ABSTRACT:
An optical transmitter operates on the DPSH-IM (direct phase-shift and self-homodyne intensity modulation) principle. The optical transmitter slightly amplitude-modulates the modulation current of a laser diode using a low frequency signal and detects the modulated component from the optical output. These features stabilize the operating point and improve the transmission waveform.

REFERENCES:
patent: 4471494 (1984-09-01), Keil
patent: 4805235 (1989-02-01), Henmi
patent: 5025487 (1991-06-01), Eichen
patent: 5161044 (1992-11-01), Nazarathy
"Fiber Transmission Properties of Optical Pulses Produced Through Direct Phase Modulation of DFB Laser Diode," Shirasaki et al., Electronics Letters, vol. 24, No. 8, Apr. 14, 1988, Enage GB, pp. 486-488.
"Field Demonstration of FSK Transmission at 2,488 Gbit/s Over A 132km Submarine Cable Using an Erbium Power Amplifier," E. G. Bryant et al., Topical Meeting on Optical Amplifiers and Their Applications, 1990, pp. 152-155.

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