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Theoretical analysis of the wavelength tuning characteristics shows that the carrier effect in λ/4-shifted DFB lasers with in-phase complex grating can produce a large red shift by a self-suppressing mechanism of the spatial hole-burning effect while maintaining stable single-mode operation. The FM response of these lasers can thus avoid having a dip at lower modulation frequencies, where the thermal red shift opposes the carrier blue shift of conventional lasers. An in-phase complex-coupled λ/4-shifted DFB laser with a ridge structure is described that gives a flat FM response from 10 kHz to over 20 GHz (3-dB bandwidth) achieved by using the self-suppressing mechanism of the spatial hole-burning effect. This bandwidth is the widest ever achieved for frequency modulation
Published in:
Selected Topics in Quantum Electronics, IEEE Journal of
(Volume:1
,
Issue:
2
)
Date of Publication: Jun 1995
- Page(s):
- 461 - 465
- ISSN :
- 1077-260X
- INSPEC Accession Number:
- 5012101
- Digital Object Identifier :
- 10.1109/2944.401229
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Jun 1995
- Sponsored by :
- IEEE Photonics Society
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