Auto bias control and bias hold circuit for IQ-modulator in flexible optical QAM transmitter with Nyquist filtering.
An Auto Bias Control (ABC) technique for the IQ-modulator of a flexible optical QAM transmitter is described. This technique can support various optical QAM signal formats with Nyquist filtering and electronic dispersion pre-compensation. 16, 32 and 64-QAM signals (21 Gbaud) are successfully generated, and all bias voltages are held to their optimum value even when signal format is changed.
Hiroto
H
Kawakami
Takayuki
T
Kobayashi
Mitsuteru
M
Yoshida
Tomoyoshi
T
Kataoka
Yutaka
Y
Miyamoto
D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D055096:Optical Devices; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D012984:Software; D013685:Telecommunications / Q000295:instrumentation*