Output characteristic of a gain guided, index anti-guided fiber amplifier under the condition of gain saturation

Abstract

We numerically investigate the output characteristic of a gain guided, index anti-guided fiber amplifier with saturated gain. The result shows that there is an output power limitation depending on the inherent leakage loss of the fiber amplifier. But we find that the amplifier with the multimode condition can operate to get a high power output with keeping a good beam shape like a Gaussian beam.

Analysis on light power and three-dimentional temperature distribution characteristics of gain guided and index alternate-guided fiber lasers

“…Siegman in 2003 [12]. Up to now, GG-IAG fiber has been explored deeply in theory and experiments [13][14][15][16], and the maximim single mode fiber core diameter can reach 400 µm. However, the experimental results showed that the efficiency of the GG-IAG fiber laser was low because the leakage loss was large [15][16][17], thus, many researchers have thought out many ways to increase the efficiency [18][19][20][21].…”

Gain-guided leaky-waveguide laser amplifiers: analytical methods and recent progress on experiments

“…Recently there has been a renewed interest in the use of solid-state waveguide lasers employing leaky or index antiguiding fields to yield single transverse mode with large mode area, especially those employing solid rather than gaseous laser media [3,4]. Most previous studies of solid-amplifier gain-guided index-antiguided (GGIAG) waveguide lasers have either assumed unsaturated operation [5] or they have emphasized homogeneously broadened amplifying media [6,7]. While many laser amplifiers in general can be considered to be homogenously broadened, inhomogeneously broadened lasers are also commonly employed in laser applications.…”