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A simple design of a stable, smoothly wavelength-tunable picosecond pulse generator has been demonstrated using a dispersion-tuned, harmonically mode-locked fiber ring laser with a directly modulated semiconductor optical amplifier (SOA). The SOA functions as both a polarization-insensitive mode locker and a supermode noise suppressor. Near-linearly chirped pulses are generated and compressed to less than 4 ps when the intracavity dispersion is anomalous while 11-ps, near-transform-limited pulses are generated without compression when the dispersion is normal. Smooth wavelength tuning is achieved over more than 11 nm by only tuning the modulation frequency and pulse characteristics are stable over the entire tuning span. A simple numerical model successively simulates the operation principle of the system. The tuning range is determined by both the gain profile and the total intracavity dispersion. The dispersion and the SOA ensure the long-term stability of the system.
Published in:
Lightwave Technology, Journal of
(Volume:21
,
Issue:
4
)
Date of Publication: April 2003
- Page(s):
- 930 - 937
- ISSN :
- 0733-8724
- INSPEC Accession Number:
- 7681146
- Digital Object Identifier :
- 10.1109/JLT.2003.810079
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 25 June 2003
- Issue Date :
- April 2003
- Sponsored by :
- IEEE Aerospace and Electronic Systems Society
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