小型半導体偏波多重光ＩＱ変調器
A compact semiconductor optical dual-polarization IQ modulator
大容量光通信用トランシーバの小型化・低消費電力化を可能にする高速変調器
A high-speed semiconductor modulator enabling ultra-compact and low-power consumption transceiver for high capacity optical communication
communication systems
高周波配線基板
(High-frequency interposer)
InP twin-IQ変調器
(InP twin-IQ modulator)
100G超級の大容量光通信を支える多値変調信号生成に対応可能
差動RF信号
(Differential RF signals)
石英PLC偏波合波回路
(Silica-PLC PMC)
キャリア
(Carrier)
TM
レンズ
(Lens)
進行波型電極構造の採用により高速動作を実現（～ 40 Gbaud）
低駆動電圧動作を実現（Vπ < 2.5V）
TE
*Vpp: 差動振幅, Volt peak-to-peak differential
半波長板
(Half-wavelength plate)
112-Gbps DP-QPSK
Size: 50 mm (L) x 13 mm (W)
*QPSK: Quadrature phase shift keying
*QAM: Quadrature amplitude modulation
*PMC: Polarization multiplexing circuit
半導体InP材料を用いた光IQ変調器と低損失の石英PLC偏波合成回路を
ハイブリット集積した超小型の偏波多重光IQ変調器を開発
86-Gbps DP-16QAM
Light output
(TE&TM)
• Ultra compact dual-polarization IQ modulator was developed by hybrid integration of InP twin-IQ
modulator and low-loss silica-PLC polarization multiplexing circuit.
• Applicable to multilevel advanced modulation formats for high-capacity ( > 100G) optical
communication networks.
• Traveling-wave electrode was introduced into modulator to achieve very high-speed operation
(~ 40Gbaud).
• Very low driving voltage of 6 Vppd for phase shift keying (PSK) modulation.
Photonic Technology

I 7

High Speed VCSELs and Optical Interconnects