Fiber lasers

Keywords lasers, laser guide star, adaptice optics, sum-frequency lasers, fiber lasers, Ra-... 

Sum-frequency mixing of two diode pumped fiber lasers (938 and 1583 nm) in a nonlinear crystal. CW format has been demonstrated at low power levels higher powers and pulsed formats are under development. 

Frequency doubled/Raman shifted fiber laser to generate 589 nm. This is a diode pumped, CW format currently under development. 

Figure 26. Block diagram of the proof of concept 589 nm CW fiber laser system.

Fiber laser guide star systems. It is now widely appreciated that the heat- dissipation characteristics of fibers, coupled with the high efficiencies demonstrated (> 80%) and excellent spatial mode characteristics, make fiber lasers a preferred candidate for many high power applications. Based on these features, fiber laser technologies would provide a compact, efficient, robust, turnkey laser source, ideally suited for LGS applications. 

With commercially available YDFL as pumps, powers > 40 W at 1178 nm are feasible. This sets an upper limit to the conversion efficiency needed in the subsequent second harmonic generation. Numerical simulations for the amplifier and resonator Raman laser configuration indicate feasibility of the system with sufficient SBS suppression. ESO has assembled the amplifier configuration, and has demonstrated up to 4 W CW at 1178 nm. ESO s goal is to have compact and turnkey commercial fiber lasers for LGS/AO within 3 years. 

Dawson, J., Beach, R., Drobshoff, A., Liao, Z., Pennington, D., Payne, S., Taylor, L., Hacken-berg, W, Bonaccini, D, High Power 938 nanometer fiber laser and amplifier, Patent Application, (case number IL-11224)... 

Goldman, A. et al.. Fiber laser intracavity absorption spectroscopy of ammonia and hydrogen cyanide in low pressure hydrocarbon flames, Chem. Phys. Lett., 423, 147, 2006. 

Ytterbium-doped glass-fiber lasers show interesting effects. 

Rare Earth Doped Fiber Lasers and Amplifiers, edited by Michel J. F. Digonnet... 

IPG Photonics. 2008. YLR-SM series 100 W to 1.5 kW single mode CW ytterbium fiber lasers. http //www.ipgphotonics.com/apps mat single YLR SM.htm (accessed March 2008). 

Fourier transform ion cyclotron resonance mass spectronomy for chemical/biological toxins, distributed feedback fiber laser for SONAR arrays and the CORMORANT (demining) lift bag. 

Millard, A. C., Wiseman, P W., Fittinghoff, D. N., et al. 1999. Third harmonic generation microscopy by use of a compact femtosecond fiber laser source. Appl. Opt. 38 7393. 

Entropy and Information Optics, FrancisT. S. Yu Computational Methods for Electromagnetic and Optical Systems, John M. Jarem and Partha P. Banerjee Laser Beam Shaping, Fred M. Dickey and Scott C. Holswade Rare-Earth-Doped Fiber Lasers and Amplifiers Second Edition, Revised and Expanded, edited by Michel J. F. Digonnet Lens Design Third Edition, Revised and Expanded, Milton Laikin Handbook of Optical Engineering, edited by Daniel Malacara and Brian J. Thompson... 

Laser Coriolis Optical fiber Laser Capacitance probe... 

Katoh X Asahara T, Naitoh Y et al. In vivo intravascular laser photodynamic lesions using a lateral direction fiber. Lasers Surg Med 1997 20 373-381. 

Rare-Earth-Doped Fiber Lasers and Amplifiers ... 

A tunable Q switched thulium-doped single mode silica fiber laser has been described [123],... 

The development of up-conversion fiber lasers, especially in the visible, is assisted by the availability of intense semiconductor lasers and mini-crystal lasers for pump sources. The various energy levels involved in pumping and lasing transitions are detailed in Sec. 8.4 and in related energy level diagrams. 

Fig. 14. Glass fiber laser. (Reproduced with permission from Annales Chim. 20 (1995) 261, Gauthier-Villars, Paris).

Characteristics of rare-earth-doped ZBLAN fluoride glass fiber lasers, (i) incident, (1) launched, and (a) absorbed pump powers, (uc) up-conversion pumping... 

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