Abstract
Ultrashort optical pulse sources in the 1.5-µm region are becoming increasingly important in terms of realizing ultrahigh-speed optical transmission and signal processing at optical nodes. This paper provides a detailed description of several types of mode-locked erbium-doped fiber laser, which are capable of generating picosecond-femtosecond optical pulses in the 1.55-µm region. In terms of ultrashort pulse generation at a low repetition rate (∼100 MHz), passively mode-locked fiber lasers enable us to produce pulses of approximately 100 fs. With regard to high repetition rate pulse generation at 10–40 GHz, harmonically mode-locked fiber lasers can produce picosecond pulses. This paper also describes the generation of a femtosecond pulse train at a repetition rate of 10–40 GHz by compressing the output pulses from harmonically mode-locked fiber lasers with dispersion-decreasing fibers. Finally, a new Cs optical atomic clock at a frequency of 9.1926 GHz is reported that uses a re-generatively mode-locked fiber laser as an opto-electronic oscillator instead of a quartz oscillator. The repetition rate stability reaches as high as 10−12−10−13.
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Nakazawa, M. (2005). Ultrafast mode-locked fiber lasers for high-speed OTDM transmission and related topics. In: Weber, HG., Nakazawa, M. (eds) Ultrahigh-Speed Optical Transmission Technology. Optical and Fiber Communications Reports, vol 3. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-68005-5_3
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DOI: https://doi.org/10.1007/978-3-540-68005-5_3
Publisher Name: Springer, Berlin, Heidelberg
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