title: Ultracompact, 160-Gbit/s transmitter optical subassembly based on 40-Gbit/s × 4 monolithically integrated light source.
abstract: The first ultracompact transmitter optical subassembly for long-distance, beyond-100-Gbit/s data communication systems based on a monolithically integrated light source is developed. The light source consists of four InGaAlAs-based electroabsorption modulator integrated DFB lasers (EADFB lasers) and their optical multiplexer and these components are monolithically integrated on one chip, resulting in very small chip size of 2.4 × 3.3 mm2. This small chip makes it possible to reduce the size of the transmitter module. Very small transmitter optical subassemblies (TOSAs), using the chip and employing three-dimensional interconnection board, is fabricated, whose volume is only 1.82 cc. By using the TOSA, 40-Gbit/s × 4 operation with the clear eye openings up to 10-km single mode fibre transmission is demonstrated. Electrical crosstalk under the multi-lane operation is also evaluated, and the error-free transmission is achieved with the power penalty to the discrete operation of 1 dB.
authors: NTT Photonics Laboratories, NTT Corporation, Morinosato Wakamiya, 3-1, Atsugi, Kanagawa, Japan. fujisawa.takeshi@lab.ntt.co.jp
authors: Takeshi
authors: T
authors: Fujisawa
authors: Toshio
authors: T
authors: Itoh
authors: Shigeru
authors: S
authors: Kanazawa
authors: Kiyoto
authors: K
authors: Takahata
authors: Yuta
authors: Y
authors: Ueda
authors: Ryuzo
authors: R
authors: Iga
authors: Hiroaki
authors: H
authors: Sanjo
authors: Takayuki
authors: T
authors: Yamanaka
authors: Masaki
authors: M
authors: Kotoku
authors: Hiroyuki
authors: H
authors: Ishii