文档介绍：ANALYSIS OF SWITCHING
PERFORMANCE OF THE
SEMICONDUCTOR OPTICAL
AMPLIFIER – MACH – ZEHNDER
INTERFEROMETER BASED
ALL-OPTICAL ADD/ DROP
MULTIPLEXER Figure1 Configuration of SOA᎐MZI based AO᎐ADM
Zhao Yongpeng1 and YePeida 1
1 . Box 125
Beijing University of Posts and munications Thereby, CW W signals interfere destructively at the
Beijing 100876, . China
k22:1 k coupler C2, and are switched to port 3. Then the
same pulse in Pc2 is injected into SOA2 via WDM2 with an
Recei¨ed 4 May 2001 appropriate time delay ⌬, inducing the same phase shift in
W signals. Hence, the MZI is reset to its initial phase
ABSTRACT: The extinction ratio, switching contrast, and amplitude condition Ž.⌬ s 0 , and the signals are switched to port 4. If
modulation() AM characteristics of a semiconductor optical amplifier the bits in the expected dropping channel are timing aligned
()᎐()
SOA based Mach Zehnder interferometer MZI as an all-optical with the center of the switching window determined by ⌬,
add᎐drop multiplexer() AO᎐ADM are analyzed. It shows that the
the dropped signal P and the transmitted signals P of the
switching performance can be impro¨ed by optimizing the splitting ratio dt
of the couplers and the relati¨e small-signal gain of the two SOAs. remaining channels emerge from ports 3 and 4, respectively.
ᮊ 2001 John Wiley & Sons, Inc. Microwave Opt Technol L