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Enhanced nonlinear spectral broadening and sub-picosecond pulse generation by adaptive spectral phase optimization of electro-optic frequency combs
- Source :
- Optics Express. 28:11215
- Publication Year :
- 2020
- Publisher :
- Optica Publishing Group, 2020.
-
Abstract
- We utilize adaptive optimization to enhance the spectral broadening of an amplified electro-optic frequency comb with a 25 GHz repetition rate in a highly nonlinear fiber and subsequently generate sub-picosecond pulses. The spectral phase of the comb is adaptively optimized by a Fourier pulse shaper in a closed control loop with the HNLF output spectrum as the process variable to be optimized. Enhanced spectral broadening also increases the stimulated Brillouin scattering threshold allowing increased power scaling and thereby boosting the bandwidth by a factor of more than 13 times over the initial comb. System versatility to varying conditions is demonstrated by achieving consistent bandwidth enhancement (nearly or more than 100 lines) in varying operating conditions that distort the temporal profile of the comb. In all cases, the optimization yields a near transform limited pulse that enters the nonlinear fiber. Sub-picosecond pulse generation is achieved with a short length of single mode fiber post the nonlinear fiber.
- Subjects :
- Materials science
business.industry
Bandwidth (signal processing)
Single-mode optical fiber
Physics::Optics
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Pulse shaping
Atomic and Molecular Physics, and Optics
010309 optics
Frequency comb
Optics
Mode-locking
Brillouin scattering
0103 physical sciences
Laser power scaling
0210 nano-technology
business
Doppler broadening
Subjects
Details
- ISSN :
- 10944087
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- Optics Express
- Accession number :
- edsair.doi.dedup.....4e9cb574d557c2f4283327710d16f678
- Full Text :
- https://doi.org/10.1364/oe.387153