EML transmitter applying band stop filter

Details EML transmitter applying band stop filter EML transmitter applying band stop filter

2005-05-10

2005-05-10

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S199200, C359S199200

Reexamination Certificate

active

06891651

ABSTRACT:
An EML transmitter having a band stop filter to improve the transmission characteristics before and after the transmission is provided. This is achieved by improving the chirp characteristics and the extinction ratio during the transmission of optical signals using an EML. The inventive EML transmitter includes: an EML for generating transmission light; a first lens for focusing optical signal outputs from the EML to prevent loss of the optical signals; a second lens for focusing the optical signals into a core portion of an optical line; and, a band stop filter for removing the D.C. component from the optical signals outputted by the EML.

REFERENCES:
patent: 5570440 (1996-10-01), Mizrahi
patent: 6212540 (2001-04-01), Murakami et al.
patent: 6222861 (2001-04-01), Kuo et al.
patent: 6563622 (2003-05-01), Mueller et al.
patent: 6580859 (2003-06-01), Maier
patent: 20030219195 (2003-11-01), Ionov

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