Yokogawa has developed heterojunction bipolar transistor IC (HBTIC) modules for 40Gbps WDM optical communication systems, employing proprietary ultra-high speed HBT devices which the company first began developing in 1983. With the HBT's ultra-high speed and low jitter characteristics, we have developed a line-up of logic ICs offering high-quality output waveforms, including a 4:1 multiplexer (MUX), 1:4 demultiplexer (DEMUX), and D flip-flop (DFF). The IC now has approximately 2,000 elements.
Furthermore, the optical modulator driver IC's frequency has been increased to 70 GHz. Of special note is our combined operation which brings together Yokogawa's R&D, design, manufacturing, marketing, and sales units to provide timely 40Gbps solutions. For the upcoming commercialization of 40Gbps, modules have been designed with V connectors for test benches and measuring instruments, GPPO compatible connectors for commercial transponders, and a CPWG for wire bonding. For our growing number of 10Gbps customers, we have a clock driver and NRZ-RZ converter.
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Yokogawa's full-WDM-band photodiode modules have high sensitivity at 40Gbps not only in the S, C, and L bands, but also in the O, E, and U bands, meaning that they can cover all the bands used in WDM transmission.
The photodiode is based on InP and is designed with a small junction diameter and reduced undoped InGaAs layer thickness to achieve a high-frequency response and optimize the carrier transport time and the RC constant. In addition, the effective relaxation of lattice mismatch in the InGaAs layer results in low dark current with high sensitivity in the U band (1625 to 1675nm).
To meet customer demands in commercial transponder and transceiver applications, Yokogawa offers a 40Gbps receiver module with a trans-impedance amplifier (TIA), limiting amplifier (LA) and small GPPO compatible connectors.
Yokogawa has also released a 10Gbps full-WDM-band photodiode module with a TIA in a surface-mount ceramic package, which is highly regarded for its flat frequency response. This 10Gbps photodiode (10G PIN/TIA) is expected to have higher wavelength efficiency for L band edge applications and U band fiber monitoring applications.
The descriptions in this page and each product page may contain registered trademarks of other companies.
