Apparatus and method for determining extinction ratio of digital

Details Apparatus and method for determining extinction ratio of digital Apparatus and method for determining extinction ratio of digital

1994-06-17

1996-07-09

Boudreau, Leo

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359110, 372 38, H04B 1004, H01S 300

Patent

active

055350380

ABSTRACT:
An apparatus and method are provided based directly on measurement of power to enable an accurate and repeatable determination of extinction ratio. One implementation includes an optical-to-electrical (O/E) converter responsive to a modulated optical signal, a multimeter connected to the O/E converter for measuring a voltage corresponding to average optical power, a power meter connected to the O/E converter for measuring a voltage corresponding to the optical power in the modulation signal, and a microprocessor for determining the extinction ratio from the measured signals corresponding to average optical power and optical power in the modulation signal.

REFERENCES:
patent: 5027362 (1991-06-01), Hokanson et al.
patent: 5028131 (1991-07-01), Donsmore
patent: 5309542 (1994-05-01), Strope et al.
patent: 5311005 (1994-05-01), Visocchi
patent: 5402433 (1995-03-01), Stiscia
patent: 5408485 (1995-04-01), Ries

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