Direct Modulation at 56 and 50 Gb/s of 1.3- $\mu $ m InGaAlAs Ridge-Shaped-BH DFB Lasers
| Autor: | Yasushi Sakuma, Yuki Wakayama, Takeshi Kitatani, Shigehisa Tanaka, Takafumi Taniguchi, Kouji Nakahara, Toshihiko Fukamachi |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Threshold current Relaxation frequency business.industry Successful transmission Heterojunction Grating Laser Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Light source Optics law Fiber laser Electrical and Electronic Engineering business |
| Zdroj: | IEEE Photonics Technology Letters. 27:534-536 |
| ISSN: | 1941-0174 1041-1135 |
| Popis: | Direct modulation at 56 and 50 Gb/s of 1.3- $\mu $ m InGaAlAs ridge-shaped-buried heterostructure (RS-BH) asymmetric corrugation-pitch-modulation (ACPM) distributed feedback lasers is experimentally demonstrated. The fabricated lasers have a low threshold current (5.6 mA at 85 °C), high temperature characteristics (71 K), high slope relaxation frequency (3.2 GHz/mA $^{\mathrm {\mathbf {1/2}}}$ at 85 °C), and wide bandwidth (22.1 GHz at 85 °C). These superior properties enable the lasers to run at 56 Gb/s and 55 °C and 50 Gb/s at up to 80 °C for back-to-back operation with clear eye openings. This is achieved by the combination of a low-leakage RS-BH and an ACPM grating. Moreover, successful transmission of 56- and 50-Gb/s modulated signals over a 10-km standard single-mode fiber is achieved. These results confirm the suitability of this type of laser for use as a cost-effective light source in 400 GbE and OTU5 applications. |
| Databáze: | OpenAIRE |
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