Abstract

In a recently published paper [Opt. Lett. 37, 3636 (2012)], equations for the evolution of the beam quality in a parabolic index (PI) fiber were introduced. Use of those equations for the extraction of the M2 parameter was erroneous, as an incorrect definition for M2 was assumed. When defined correctly, M2 in PI fibers is shown here to be constant. Nonetheless, the optimization of the power delivery properties of PI fibers is governed by the criterion introduced in the paper under discussion.

© 2013 Optical Society of America

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References

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  1. R. Zuitlin, Y. Shamir, Y. Sintov, and M. Shtaif, Opt. Lett. 37, 3636 (2012).
    [CrossRef]
  2. H. Yoda, P. Polynkin, and M. Mansuripur, J. Lightwave Technol. 24, 1350 (2006).
    [CrossRef]
  3. S. G. Krivoshlykov and W. Neuberger, “Power laser delivery fiber system with enhanced damage threshold,” U.S. patent 5,557,701 (September17, 1996).

2012 (1)

2006 (1)

Krivoshlykov, S. G.

S. G. Krivoshlykov and W. Neuberger, “Power laser delivery fiber system with enhanced damage threshold,” U.S. patent 5,557,701 (September17, 1996).

Mansuripur, M.

Neuberger, W.

S. G. Krivoshlykov and W. Neuberger, “Power laser delivery fiber system with enhanced damage threshold,” U.S. patent 5,557,701 (September17, 1996).

Polynkin, P.

Shamir, Y.

Shtaif, M.

Sintov, Y.

Yoda, H.

Zuitlin, R.

J. Lightwave Technol. (1)

Opt. Lett. (1)

Other (1)

S. G. Krivoshlykov and W. Neuberger, “Power laser delivery fiber system with enhanced damage threshold,” U.S. patent 5,557,701 (September17, 1996).

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Equations (7)

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M 2 = 4 B σ x 2 ( z ) + A 2 ,
A = d x d y ( x x ( z ) ) × [ E ( x , y , z ) · E * x ( x , y , z ) c.c. ] ,
B = d x d y | E x ( x , y , z ) | 2 + 1 4 { d x d y [ E ( x , y , z ) · E * x ( x , y , z ) c.c. ] } 2 .
H m ( x ) = 2 m H m 1 ( x )
( M x 2 ) 2 = 4 [ σ x 0 2 σ k x 0 2 ( C + x 0 k x 0 ) 2 ] ,
σ x 2 ( z ) = w 4 σ k x 0 2 4 sin 2 ( Δ β z ) + σ x 0 2 cos 2 ( Δ β z ) w 2 2 ( C + x 0 k x 0 ) sin ( 2 Δ β z ) .
w 4 σ k x 0 2 4 = σ x 0 2 ,

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