Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 38, Issue 24, Pages 6932-6938Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2020.3022604
Keywords
Optical fiber dispersion; Chirp; Optical fibers; Optical pulse generation; Optical fiber communication; Solitons; Computational modeling; fibers; pulse compression; nonlinear optics
Funding
- National Natural Science Foundation of China [61675008]
- Shenzhen Science and Technology Innovation Commission [GJHZ20180411185015272]
- Royal Society Kan Tong Po International Fellowship
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We propose a practical scheme to demonstrate the combination and subsequent self-similar compression of two pulses with the same or different central wavelengths while propagating through a nonlinear fiber with exponentially decreasing dispersion. To initiate these processes, two raised cosine pulses with the same or different wavelengths is modulated using a phase modulator to acquire the same chirp at the input of the fiber. While propagating through the nonlinear fiber, these chirped pulses first coalesce into a single pulse and during further propagation get compressed into a single ultrashort high-power pulse. The output pulse possesses a large compression factor, high proportion of energy and peak power compared to a single input pulse. We also report the combination and compression of five raised cosine pulses with different wavelengths to achieve an appreciable compression effect, indicating that this system works well even with a small number of input pulses. The proposed scheme provides a simple way to generate high power ultrashort pulse with high energy and good quality in a short length of fiber.
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