TY - JOUR
T1 - Polarization-independent low-crosstalk operation of InAlGaAs-InAlAs mach-zehnder interferometer-type photonic switch with hybrid waveguide structure
AU - Ueda, Yuta
AU - Nakamura, Shinya
AU - Fujimoto, Shinji
AU - Yamada, Hiroto
AU - Utaka, Katsuyuki
AU - Shiota, Takashi
AU - Kitatani, Takeshi
N1 - Funding Information:
Manuscript received February 27, 2009; revised April 21, 2009. First published June 02, 2009; current version published July 24, 2009. This work was supported by the Ministry of Education, Culture, Sports, Science and Technology, Japan, under the Grant-in-Aid for Scientific Research on Priority Area “Innovation for New-Generation Optical Communications” (19023010).
PY - 2009/8/15
Y1 - 2009/8/15
N2 - In this letter, we demonstrated a Mach-Zehnder interferometer-type photonic switch using multimode interference (MMI) couplers with InAlGaAs-InAlAs compound semiconductor materials. A hybrid-waveguide structure with different etching depths was adopted for MMI couplers and other parts of the waveguides for polarization-independent operation. As a result, low-crosstalk switching operation of less than -20 dB was confirmed regardless of polarizations of an input light. Switching currents were, respectively, 5.25 and 4.75 mA for TE and TM modes of the input light. High-speed switching operation with about 3-ns transition time was also confirmed.
AB - In this letter, we demonstrated a Mach-Zehnder interferometer-type photonic switch using multimode interference (MMI) couplers with InAlGaAs-InAlAs compound semiconductor materials. A hybrid-waveguide structure with different etching depths was adopted for MMI couplers and other parts of the waveguides for polarization-independent operation. As a result, low-crosstalk switching operation of less than -20 dB was confirmed regardless of polarizations of an input light. Switching currents were, respectively, 5.25 and 4.75 mA for TE and TM modes of the input light. High-speed switching operation with about 3-ns transition time was also confirmed.
KW - InAlGaAs-InAlAs compound semiconductor
KW - Mach-Zehnder (MZ) interferometer photonic switch
KW - Multimode interference (MMI) coupler
KW - Polarization independence
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U2 - 10.1109/LPT.2009.2023678
DO - 10.1109/LPT.2009.2023678
M3 - Article
AN - SCOPUS:68449104163
SN - 1041-1135
VL - 21
SP - 1118
EP - 1120
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
IS - 16
ER -