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      • Department of Electrical and Electronics Engineering
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      Ultra-low timing-jitter passively mode-locked fiber lasers for long-distance timing synchronization

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      Author
      İlday, F. Ömer
      Winter, A.
      Kim J.-W.
      Chen, J.
      Schmüser, P.
      Schlarb, H.
      Kärtner, F. X.
      Date
      2006
      Source Title
      Proceedings of SPIE
      Print ISSN
      0277-786X
      Publisher
      SPIE
      Volume
      6389
      Language
      English
      Type
      Conference Paper
      Item Usage Stats
      169
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      116
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      Abstract
      One of the key challenges for the next-generation light sources such as X-FELs is to implement a timing stabilization and distribution system to enable ∼ 10 fs synchronization of the different RF and laser sources distributed in such facilities with distances up to a few kilometers. These requirements appear to be beyond the capability of traditional RF distribution systems based on temperature-stabilized coaxial cables. A promising alternative is to use an optical transmission system: A train of pulses generated from a laser with low timing jitter is distributed over length-stabilized fiber links to remote locations. The repetition frequency of the pulse train and its higher harmonics contain the synchronization information. At the remote locations, RF signals are extracted simply by using a photodiode and a suitable bandpass filter to pick the desired harmonic of the laser repetition rate. Passively mode-locked Er-doped fiber lasers provide excellent long-term stability. The laser must have extremely low timing jitter, particularly at high frequencies (>1 kHz). Ultimately, the timing jitter is limited by quantum fluctuations in the number of photons making up the pulse and the incoherent photons added in the cavity due to spontaneous emission. The amplitude and phase noise of a home-built laser, generating 100-fs, 1-nJ pulses, was characterized. The measured phase noise (timing jitter) is sub-10 fs. from 1 kHz to Nyquist frequency. In addition to synchronization of accelerators, the ultra-low timing jitter pulse source can find applications in next-generation telecommunication systems.
      Keywords
      Fiber
      Laser
      Phase-noise
      Photonics
      RF
      Timing jitter
      Ultrafast optics
      Harmonic analysis
      Laser mode locking
      Light sources
      Optical cables
      Synchronization
      Timing jitter
      Phase-noise
      Photonics
      Ultrafast optics
      Fiber lasers
      Permalink
      http://hdl.handle.net/11693/27220
      Published Version (Please cite this version)
      https://doi.org/10.1117/12.687364
      Collections
      • Department of Electrical and Electronics Engineering 3605
      • Department of Physics 2336
      • Institute of Materials Science and Nanotechnology (UNAM) 1845
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