Results 261 to 270 of about 10,828,663 (311)

Ultra-Large Mode-Area Fibers

2007 Conference on Lasers and Electro-Optics (CLEO), 2007
We review the performance and applications of a recently demonstrated platform that utilises higher-order modes in few-moded fibers to facilitate robust, bend-resistant, long-length light-propagation in ultra-large modal areas.
Siddharth Ramachandran, Samir Ghalmi, Man Yan   +2 more
openaire   +1 more source

Efficient harmonic generation with large-mode-area fiber sources [PDF]

Technical Digest. Summaries of Papers Presented at the Conference on Lasers and Electro-Optics. Conference Edition. 1998 Technical Digest Series, Vol.6 (IEEE Cat. No.98CH36178), 1998
We present the results of a series of experiments using doped fiber sources in which we have, to the best of our knowledge, demonstrated the highest ever pulse energies from a Q-switched fiber laser (180 /spl mu/J), the high second-harmonic conversion efficiency from a single pass in PPLN (periodically poled LiNbO/sub 3/) (83%), and the first ...
Britton, P.E., Richardson, D.J., Taverner, D., Smith, P.G.R., Ross, G.W., Hanna, D.C.   +5 more
openaire   +1 more source

Filamentation analysis in large-mode-area fiber lasers

Journal of the Optical Society of America B, 2006
We drive an analytic expression for filament gain in fiber lasers due to self focusing. The filamentation process has two thresholds that must be met, with beam-quality degradation occurring for peak powers above a megawatt.
L. Sun, J. R. Marciante
openaire   +1 more source

Photodarkening measurements in large mode area fibers

SPIE Proceedings, 2007
Yb-doped fibers are widely used in applications requiring high average output powers and high power pulse amplification. Photodarkening is one limiting factor in these fibers. In this paper, characterization of photodarkening in large-mode-area (LMA) fibers is presented building upon our previous work, which indicated that meaningful comparison of ...
Joona Koponen, Mikko Söderlund, Hanna J. Hoffman, Dahv Kliner, Jeffrey Koplow   +4 more
openaire   +1 more source

Rectangle Lattice Large Mode Area Photonic Crystal Fiber

Optical Fiber Communication Conference, 2014
A rectangle-lattice photonic crystal fiber with a mode area of 2471 μm2 is successfully fabricated for the first time.
Xin Wang 0091, Shuqin Lou, Wenliang Lu
openaire   +1 more source

Highly dispersive large mode area photonic bandgap fiber

Optics Letters, 2007
An all-silica photonic bandgap fiber composed of a low-index core surrounded by alternating high- and low-index rings allows us to achieve a large mode area (500 microm(2)) and large chromatic dispersion. Sharp resonances from the even Bragg mode to odd ring modes theoretically lead to 20,000 ps/(nm km) chromatic dispersion when large bends are applied.
Gérôme, Frédéric, Février, Sébastien, Pryamikov, A., Auguste, Jean-Louis, Jamier, Raphaël, Blondy, Jean-Marc, Likhachev, M.E., Bubnov, M.M., Semjonov, S.L., Dianov, E.M.   +9 more
openaire   +3 more sources

Bend-compensated design of large-mode-area fibers

Optics Letters, 2006
Cone-shaped profiles illustrate the recently proposed bend-compensated strategy for large-mode-area amplifier fiber design. Simulations show that introducing a bend-compensating gradient into the fiber profile simultaneously improves mode area and reduces higher-order-mode impairments in a spooled-fiber amplifier.
openaire   +2 more sources

Demonstration of bend-induced nonlinearities in large-mode-area fibers

Optics Letters, 2007
We present what we believe to be the first direct measurements of enhanced nonlinearities in large-mode-area fibers due to bend induced reductions in effective area. Both Raman scattering and self-phase modulation are observed to increase in tightly coiled fibers.
J W, Nicholson, J M, Fini, A D, Yablon, P S, Westbrook, K, Feder, C, Headley   +5 more
openaire   +2 more sources

Large-mode-area optical fiber for photonic nanojet generation

Optics Letters, 2019
The photonic nanojet (PNJ) generated by a shaped optical fiber tip is an attractive technology for laser micro-machining. The working distance has the same order of size as the fiber core diameter; therefore, multimode (MM) fibers are generally preferred.
Pierron, Robin, Chabrol, Grégoire, Roques, Stéphane, Pfeiffer, Pierre, Yehouessi, Jean-Paul, Bouwmans, Géraud, Lecler, Sylvain   +6 more
openaire   +4 more sources

Reduction of bend loss in large-mode-area Bragg fibres

SPIE Proceedings, 2007
The delivery or generation of high power in optical fibre requires the increase of the core size to increase the threshold of nonlinear effects and the damage threshold. However the bend loss strongly limits the increase of the effective area (A eff ).
Jamier, Raphaël, Février, Sébastien, Humbert, Georges, Devautour, Mathieu, Viale, Pierre, Blondy, Jean-Marc, Semjonov, S.L., Likhachev, M.E., Bubnov, M.M., Dianov, E.M., Khopin, V.F., Salganskii, M.Y., Guryanov, A.N.   +12 more
openaire   +2 more sources