access icon free Quantum dash based directly modulated lasers for long-reach access networks

An innovative 10 Gbit/s single mode optical transmitter with the capacity of error-free transmission is demonstrated in the range of 0–100 km with constant biasing conditions by using a quantum dash directly modulated laser. A commercially available etalon filter is used as a passive optical filter to achieve penalty-free transmission with a dynamic extinction ratio >6 dB over a large range of fibre spans.

Inspec keywords: optical transmitters; optical filters; quantum dash lasers; optical modulation; optical fibre subscriber loops

Other keywords: error-free transmission; quantum dash-based directly modulated lasers; bit rate 10 Gbit/s; constant biasing conditions; passive optical filter; dynamic extinction ratio; long-reach access networks; etalon filter; single mode optical transmitter; distance 0 km to 100 km

Subjects: Laser beam modulation, pulsing and switching; mode locking and tuning; Optical coatings and filters; Optical beam modulators; Lasing action in semiconductors; Spatial filters, zone plates, and polarizers; Subscriber loops; Design of specific laser systems; Optical communication devices, equipment and systems; Laser beam modulation, pulsing and switching; mode locking and tuning; Optical communication equipment; Optical fibre networks; Semiconductor lasers

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      • 3. Morton, P.A., Tanbun-Ek, T., Logan, A., et al: ‘High speed, low chirp, directly modulated 1.55 μm DFB laser sources for 10 Gbit/s local distribution’. Proc. Optical Fiber Communication, San Jose, CA, USA, February 1996, TuH6, pp. 3940.
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