This will count as one of your downloads.
You will have access to both the presentation and article (if available).
We suppress stimulated Brillouin scattering in an erbium-doped optical fiber amplifier for 50-ns-long transform-limited signal pulses by counter-directional pumping with a pulse burst. The pump pulse burst is codirectional with the parasitic Brillouin Stokes wave, which, therefore, undergoes cross-phase modulation and thus spectral broadening due to the intensity-modulated pump. The broadening inhibits its growth. We experimentally study the effect of pump pulse parameters and improve the SBS threshold by up to 4 dB when amplifying signal pulses at a wavelength of 1565 nm with pumping at 1536 nm.
This will count as one of your downloads.
You will have access to both the presentation and article (if available).
This course describes the current state of the art, research directions, and principles of high-power fiber lasers and amplifiers. Recent advances have permitted output powers of these devices to reach well over a kilowatt, and underpinning fiber technology, pump lasers and pump coupling will be addressed. Rare-earth-doped fiber devices including those based on Yb-doped fibers at 1.0 - 1.1 μm and the more complicated Er:Yb codoped fibers at 1.5 - 1.6 μm and Tm-doped fibers at 2 μm will be described in detail. Operating regimes extend from continuous-wave single-frequency to short pulses. Key equations will be introduced to establish limits and identify critical parameters. For example, high pump brightness is critical for some devices but not others. Methods to mitigate limitations in different operating regimes will be discussed. A large core is a critical fiber design feature of high-power fiber lasers, and the potential and limits of this approach will be covered, e.g., as it comes to beam quality. Advanced options such as beam combining and electronic control for enhanced performance will be considered, as well, together with other topics of particular interest to attendees (insofar as time allows).
Rare-earth-doped fiber lasers and amplifiers have revolutionized the field of optical communications. Amplifiers allow propagating multiple-wavelength light signals modulated at extremely high bit rates along fibers thousands of kilometers long. Fiber lasers provide coherent light emission in wavelength regions (ultraviolet to mid-infrared) and with power and coherence properties not available from diode lasers. This course describes the spectroscopy of rare-earth-doped glass fibers, the operating principles of the laser and amplifier devices based on these fibers, and the basic mathematical models that describe their performance. It also provides a broad overview of the different types of fiber lasers and amplifiers, as well as detailed descriptions of cornerstone devices, such as Er-doped fiber amplifiers, Raman fiber amplifiers, and high-power Yb-doped and Nd-doped fiber master-oscillator power amplifiers. The performance and characteristics of numerous representative devices are reviewed, including the configuration, threshold, conversion efficiency, and polarization behavior of fiber lasers, and the pumping schemes, gain, noise, and polarization dependence of fiber amplifiers.
View contact details
No SPIE Account? Create one
