Ryota Takemura

Four-channel 25Gbps optical receiver for 100Gbps Ethernet with built-in demultiplexer optics

A compact four-channel 25Gbps receiver with built-in demultiplexer realizes high sensitivity less than −12.1dBm and low cross-talk penalty of less than 0.1dB per channel in 12mm × 17mm × 7mm for the next-generation 100Gbps Ethernet applications.

25Gbps × 4ch photodiode array with high responsivity for 100Gbps Ethernet

Four-channel surface-illuminated photodiodes monolithically integrated in one array chip are fabricated for 100Gbps Ethernet. The photodiode with an optimized distributed Bragg reflector has a 3dB bandwidth of 25GHz and the highest responsivity of 0.92A/W at a 1.3µm wavelength.

Wide wavelength bandwidth integrated ROSA using high responsivity resonant cavity 25 Gbps avalanche photodiode

High responsivity resonant cavity APDs were successfully applied to integrated ROSA using wavelength dependence compensation technique. Variation of ROSA responsively in LAN-WDM grid was reduced from 0.23 A/W to 0.05 A/W.

25 Gbps optical link for ultra-high-definition-television streaming

We propose 25 Gbps optical link for uncompressed ultra-high-definition-television streaming and demonstrate it over 3 km single mode fiber employing low-cost and compact optical transmitter and receiver set.