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Impact of Damping on High-Speed Large Signal VCSEL Dynamics
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- Haglund, Emanuel, 1988 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Westbergh, Petter, 1981 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Gustavsson, Johan, 1974 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- (creator_code:org_t)
- 2015
- 2015
- English.
- In: Journal of Lightwave Technology. - 0733-8724 .- 1558-2213. ; 33:4, s. 795 - 801
- Journal article (peer-reviewed)
Abstract
Subject headings
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- An investigation of the optimal relaxation oscillation damping for high-speed 850-nm vertical-cavity surface-emitting laser (VCSEL) under large signal operation is presented, using devices with K-factors ranging from 0.1 to 0.4 ns. Time-domain measurements of turn-on transients are used to quantify damping dependent rise times, overshoots, and signal amplitudes. Optical eye diagrams together with timing jitter and bit error rate measurements reveal a tradeoff between the rise time and the duration of the relaxation oscillations. To produce a high-quality eye at a specific data rate, a proper amount of damping is needed to simultaneously obtain sufficiently high bandwidth and low timing jitter. We found that for error-free transmission, a VCSEL with a 0.3 ns K-factor achieved the best receiver sensitivity at 10 and 25 Gb/s, whereas a less damped VCSEL with a 0.2 ns K-factor achieved the best sensitivity at 40 Gb/s.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)
Keyword
- high-speed modulation
- relaxation oscillation
- semiconductor lasers
- large signal modulation
- vertical cavity surface-emitting laser (VCSEL)
- photon lifetime
- Damping
Publication and Content Type
- art (subject category)
- ref (subject category)
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