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ND:YAG light source and external modulator for a VSB‐AM video transmitter: A performance evaluation
Author(s) -
Trisno Y.,
Grubb D.
Publication year - 1990
Publication title -
international journal of digital and analog communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1047-9627
DOI - 10.1002/dac.4510030407
Subject(s) - transmitter , optics , laser , modulation (music) , electro optic modulator , modulation index , materials science , pulse width modulation , light source , power (physics) , optoelectronics , optical modulator , channel (broadcasting) , physics , computer science , telecommunications , acoustics , phase modulation , quantum mechanics , phase noise
A miniature Nd:YAG laser and an intensity modulator based VSB‐AM video signal transmitter are described. With a light source having RIN level below ‐170 dB/Hz, the system allows a relatively low modulation index to be used. For a 40 channel system using a standard MZ, a CTB = 60 dB corresponds to m i = 1 per cent. With a 75 mW Nd:YAG laser source, a system with a power budget of 5.5 dB and 50 dB CNR is realizable. Several promising techniques of modulator linearization are also given.