Fibre laser

Q switching of the fibre lasers by lasers using an acousto-optic modulator/rotating chopper results in peak powers of several watts in pulses in the range of 50 ns to 1 ps. 

K. Kuriki, Y. Koike, and Y. Okamoto, Chem. Rev., 2002, 102, 2347 (plastic optical fibre lasers and... 

Wadsworth, W., Percival, R., Bouwmans, G. et at., High power air-clad photonic crystal fibre laser, Opt. Express, 11, 48, 2003. 

Wadsworth, W., Knight, J., Reeves, W. et al., Yb +-doped photonic crystal fibre laser, Electron. Lett., 36, 1452, 2000. 

Mears, R. J., et al.. Neodymium-doped silica single-mode fibre lasers. Elect. Lett., 27(17), 738 (1985). 

Picosecond diode lasers are by far the most economic light sources for DOT. Fibre lasers [223] and Ti Sapphire lasers [222, 443] have been used as well. These lasers have high power and short pulse width, but a high price. Wavelength multiplexing can be achieved only by synchronising several lasers and at a pulse-by-pulse basis. 

Fibre lasers deliver femtosecond pulses around 1,600 nm, or at the SHG wavelength of 800 nm. The power is a few tens ofmW, the pulse width about 150 fs, and the repetition rate about 80 MHz. The power is sufficient for two-photon excitation in scanning microscopes. Further frequency doubling is possible. Fibre lasers are... 

Instead of the ring fibre laser also a linear fibre laser such as the design shown in Fig. 6.38, can be realized. The light amplification takes place in the erbium doped fibre ring. The saturable absorber in front of the end mirror causes passive mode... 

With such fibre lasers [698] pulses below 100 fs can be realized as a matter of routine, and with special designs also below 10 fs [699]. With cw fibre lasers pumped by diode lasers output powers in the range of several kilowatts are achieved [700, 701]. 

A user friendly version of optical frequency combs has been realized with fibre lasers [1328]. Mode-locked fibre lasers doped with Er of Yb ions have only a few adjustable optical components which make them easy to handle and facilitates their maintenance. Meanwhile optical frequency combs are commercially available. 

A. Stark et al.. Intercavity Absorption Spectroscopy with Thulium-doped Fibre Laser. Opt. Commun. 215, 113 (2003)... 

M.E. Fermann et al., Ultrawide tunable Er soliton fibre laser amplifier in Yb-doped fibre. Opt. Lett. 24, 1428 (1999)... 

Wang F, Rozhin AG, Scardaci V, Sun Z, Hennrich F, White IH, et al. Wideband-tuneable, nanotube mode-locked, fibre laser. Nat Nanotechnol 2008 3 738-42. 

Bioceramic coatings Bone china component Polymer melt-blends Optical lenses Optical fibres Lasers... 

Many of the uncertainties associated with the above tests arise from the model used to calculate the stress or strain transferred between the matrix and fibre. (Laser Raman or Fluorescence Spectroscopy) LRS is a technique for determining directly the strain in the fibre in analogy to an embedded strain gauge. The strain is probed by recording a Raman (or fluorescence) spectrum of the reinforcing fibre at increments of applied strain. The shift in the frequency at which a stress-sensitive peak occurs can be used to estimate the strain profile in fhe reinforcing fibre. The rate of strain development in the fibre can be used to assess the quality of the interface. Quantification still requires an appropriate stress-transfer model although a simple force-balance calculation can be used to estimate the interfacial shear stress. 

France, P. W., ed. (1991). Optical Fibre Lasers and Amplifiers, Blackie, Glasgow/London. 

Mori A., Ohishi Y., and Sudo S., Erbium-doped tellurite glass fibre laser... 

Y. Miyajima, T. Komukai, T. Sugawa and T. Yamamoto, Rare earth-doped fluoride fibre amplifiers and fibre lasers. Opt. Fibre Technol., 1, 35-47 (1994). 

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