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Programmable select multiwavelength gigahertz Raman soliton pulse generation
Masao Kato1, Kazuo Fujiura, Takashi Kurihara
1NTT Photonics Laboratories, Nippon Telegraph and Telephone Corporation, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan. katom@aecl.ntt.co.jp
Applied Optics
|October 29, 2004
Summary
Researchers demonstrate programmable multiwavelength pulses using Raman soliton self-frequency shift. This method generates tunable picosecond pulses with low bit error rates, suitable for advanced optical networks.
Area of Science:
- Photonics and Optical Engineering
- Nonlinear Optics
- Fiber Optics
Background:
- Wavelength-agile light sources are crucial for advanced optical communication systems.
- Raman solitons offer a promising platform for generating ultrashort optical pulses.
- Controlling soliton dynamics is key to achieving tunable multiwavelength outputs.
Purpose of the Study:
- To demonstrate the generation of programmable multiwavelength pulses using the self-frequency shift of Raman solitons.
- To investigate the tunability and performance characteristics of these generated pulses.
- To assess the suitability of these pulses for optical communication and signal processing applications.
Main Methods:
- Utilizing a Raman soliton in an optical fiber to induce a self-frequency shift.
- Employing a fiber laser to generate the initial soliton pulse.
- Characterizing the generated multiwavelength pulses through optical spectrum analysis, bit error rate (BER) measurements, and relative intensity noise (RIN) analysis.
Main Results:
- Successfully generated programmable multiwavelength picosecond pulses with a tuning range of approximately 50 nm.
- Achieved a high repetition rate of 9.95 GHz for each wavelength channel.
- Obtained a bit error rate (BER) better than 1 x 10(-9) and relative intensity noise (RIN) better than -135.5 dBc/Hz.
Conclusions:
- The demonstrated Raman soliton-based approach enables the generation of tunable multiwavelength picosecond pulses.
- The excellent BER and RIN performance indicates the high quality and stability of the generated pulses.
- These frequency-shifted Raman soliton pulses show significant potential for applications in optical measurement, signal processing, and wavelength routing in optical packet networks, supporting both 1:1 communication and 1:N multicasting.