Video multicast using a VSB-AM external modulator at 1.5 mu m

Author

Trisno, Y.S. ; Huber, D.R.

Author_Institution

General Instrument Corp., Hatboro, PA, USA

Volume

3

Issue

7

fYear

1991

fDate

7/1/1991 12:00:00 AM

Firstpage

666

Lastpage

668

Abstract

At 1.5 mu m VSB-AM video signal source is demonstrated using a balanced Mach-Zehnder external modulator. The source is a continuous wave Er-doped glass laser operating at 1.534 mu m. The predistortion network reduces the Mach-Zehnder third-order distortion level by 17-21 dB across the 330-450 MHz frequency band. The transmitter third order distortion level is better than 60 dBc for 4.0% modulation index per channel in a 20 channel system. A carrier-to-noise ratio of 54 dB was achieved at 0 dBm detected power. With 12.6 km of standard single-mode fiber (SMF) which has minimum dispersion near 1310 nm, no noticeable system carrier-to-noise ratio or composite second order distortion degradation are detected. Measurement with 10.5 km of distortion shifted fiber (DSF), which has minimum dispersion near 1550 nm, showed little carrier-to-noise degradation.<>

Keywords

amplitude modulation; electro-optical devices; light interferometers; optical links; optical modulation; video signals; 1.5 micron; 1.534 micron; 10.5 km; 12.6 km; 1310 nm; 1550 nm; 330 to 450 MHz; VSB-AM external modulator; VSB-AM video signal source; balanced Mach-Zehnder external modulator; carrier-to-noise ratio; continuous wave Er-doped glass laser; distortion shifted fiber; minimum dispersion; predistortion network; second order distortion; single-mode fiber; third-order distortion level; transmitter; video multicast; Acoustic distortion; Chirp modulation; Erbium; Frequency; Glass; Laser modes; Laser noise; Optical modulation; Optical transmitters; Predistortion;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.87948

Filename

87948