1. 30-km Error-Free Transmission of Directly Modulated DFB Laser Array Transmitter Optical Sub-Assembly for 100-Gb Application
- Author
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Yuta Ueda, Wataru Kobayashi, Hiroyuki Ishii, Toshihide Yoshimatsu, Takeshi Fujisawa, Shigeru Kanazawa, Hiroaki Sanjoh, Tetsuichiro Ohno, and Kiyoto Takahata
- Subjects
Physics ,Distributed feedback laser ,Optical fiber ,business.industry ,Photonic integrated circuit ,02 engineering and technology ,Multiplexer ,Atomic and Molecular Physics, and Optics ,Semiconductor laser theory ,100 Gigabit Ethernet ,law.invention ,020210 optoelectronics & photonics ,law ,0202 electrical engineering, electronic engineering, information engineering ,Optoelectronics ,Transceiver ,business ,Adaptive optics - Abstract
We fabricated the first compact 100-gigabit Ethernet (100GbE) transmitter optical sub-assembly (TOSA) using a directly modulated DFB laser (DML) array monolithically integrated with an optical multiplexer. Specially designed InGaAlAs/InGaAlAs multiple quantum wells make it possible to obtain a large gain in the 1295–1310-nm wavelength range and to operate at a high temperature of 55 °C. The four-channel DML array chip is only $2.0 \,\text{mm} \times 2.4 \,\text{mm}$ in size, and the fabricated TOSA is only $7.2 \,\text{mm} (W) \times 14.3 \,\text{mm} (L) \times 6.5 \,\text{mm} (H)$ , which fits a CFP2 or smaller 100-GbE transceiver. For all the lanes, the 3-dB bandwidths of the TOSA exceeded 17 GHz, and it could operate at 25.8 Gb/s. With 25.8-Gb/s × four-channel simultaneous operation, error-free transmissions over a 30-km single-mode fiber were demonstrated for all the lanes.
- Published
- 2016