Duobinary optical transmission apparatus

Details Duobinary optical transmission apparatus Duobinary optical transmission apparatus

2007-05-29

2007-05-29

Sedighian, M. R. (Department: 2613)

Optical communications

Transmitter

Having particular modulation

C398S198000, C398S183000

Reexamination Certificate

active

10459788

ABSTRACT:
A duobinary optical transmission apparatus is provided to generate duobinary optical signals, without using an electric low-pass-filter (LPF), by restricting a bandwidth of a Mach-Zehnder-interferometer-type optical intensity modulator (MZ MOD). Alternatively, a LPF having a single pole with a single capacitor is implemented instead of an expensive LPF, thereby providing a simple transmitter with a lower production cost in comparison with a transmitter using a conventional electric LPF.

REFERENCES:
patent: 6865348 (2005-03-01), Miyamoto et al.
patent: 2002-077059 (2002-03-01), None
Yonghoon Kim, Jaehoon Lee, Yonggyoo Kim ; Jichai Jeong; “Evaluation of Transmission Performance in New Duo-Binary Transmission Using Modulator's Bandwidth or Low-Pass Filter Implemented by Single Capacitor” Photonics Conference 2002, Oct. 30-Nov. 1, 2002, 3 pages.

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