15-GHz modulation bandwidth, ultralow-chirp 1.55-μm directly modulated hybrid distributed Bragg reflector (HDBR) laser source

A hybrid source has been realized, integrating a fast Fabry-Perot laser and a fiber grating. The device has shown very good performances in the 1530-1570-nm range, obtaining 16 mA of threshold current at 20/spl deg/C, 1.6-mW fiber optical power and 48 dB of sidemode suppression ratio at 50 mA bias c...

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Bibliographic Details
Published in:IEEE photonics technology letters 1998-12, Vol.10 (12), p.1691-1693
Main Authors: Paoletti, R., Meliga, M., Rossi, G., Scofet, M., Tallone, L.
Format: Article
Language:English
Subjects:
Bandwidth
Chirp modulation
Fabry-Perot
Fiber gratings
Fiber lasers
Optical devices
Optical fiber devices
Optical modulation
Temperature dependence
Threshold current
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Summary:A hybrid source has been realized, integrating a fast Fabry-Perot laser and a fiber grating. The device has shown very good performances in the 1530-1570-nm range, obtaining 16 mA of threshold current at 20/spl deg/C, 1.6-mW fiber optical power and 48 dB of sidemode suppression ratio at 50 mA bias current. The cavity length was designed to achieve a good tradeoff between chirp reduction and increasing speed. The device has shown for the first time, to our knowledge, more than 15 GHz of small-signal modulation bandwidth, and 10-Gb/s modulation capability. Moreover, a penalty-free transmission experiment at 2.5 Gb/s over 100 km of standard fiber has confirmed the very low wavelength chirp of the device. These previous characteristics together with an extremely low temperature dependence (
ISSN:1041-1135
1941-0174
DOI:10.1109/68.730471