Abstract

An optical discharge running through a single-mode silica glass fiber during fiber fuse was observed and the front part of the generated damage was examined. Their pump power dependences were investigated using a 1.48 μm laser light at powers ranging from 1.1 to 9.0 W. Periodic voids were left by an optical discharge that was in a cavity with a tail. The tail appears because the optical discharge is strongly enclosed in core region. Another mode of periodic void formation was found at near the threshold pump power for fiber fuse propagation. The optical discharge in this case also forms a transient tail during the void formation cycle.

© 2005 Optical Society of America

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References

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Conference on Lasers and Electro-Optics (1)

S. Yanagi, S. Asakawa, M. Kobayashi, Y. Shuto, and R. Naruse, �??Fiber fuse terminator,�?? in The 5th Pacific Rim Conference on Lasers and Electro-Optics, vol. 1, p. 386 (2003). (W4J-(8)-6, Taipei. Taiwan, 22-26 Jul. 2003),

Electron. Lett. (2)

R. Kashyap and K. J. Blow, �??Observation of catastrophic self-propelled self-focusing in optical fibres,�?? Electron. Lett. 24, 47�??9 (1988).
[CrossRef]

D. P. Hand and T. A. Birks, �??Single-mode tapers as �??fibre fuse�?? damage circuit-breakers,�?? Electron. Lett. 25(1), 33�??34 (1989).
[CrossRef]

European Conf. Optical Communication (1)

S. Todoroki, �??In-situ observation of fiber-fuse propagation,�?? in Proc. 30th European Conf. Optical Communication Post-deadline papers, pp. 32�??33 (Kista Photonics Research Center, Stockholm, Sweden, 2004). (Th4.3.3).

ICONO/LAT Technical Digest (1)

S. Todoroki, �??In-situ observation of fiber-fuse ignition,�?? in ICONO/LAT 2005 Technical Digest on CD-ROM (St. Petersburg, Russia, 2005). (LSK3).

Jpn. J. Appl. Phys. (1)

S. Todoroki, �??In-situ observation of fiber-fuse propagation,�?? Jpn. J. Appl. Phys. 44(6A), 4022�??4024 (2005).
[CrossRef]

OFC/NFOEC Technical Digest (1)

I. A. Bufetov, A. A. Frolov, E. M. Dianov, V. E. Fortov, and V. P. Efremov, �??Dynamics of fiber fuse propagation,�?? in OFC/NFOEC 2005 Technical Digest (Anaheim, 2005). (OThQ7).

Opt. Lett. (5)

Physics-Uspekhi (1)

I. A. Bufetov and E. M. Dianov, �??Optical discharge in optical fibers,�?? Physics-Uspekhi 48(1), 91�??94 (2005).
[CrossRef]

Proc. SPIE (1)

D. D. Davis, S. C. Mettler, and D. J. DiGiovani, �??Experimental data on the fiber fuse,�?? in 27th Annual Boulder Damage Symposium: Laser-Induced Damage in Optical Materials: 1995, H. E. Bennett, A. H. Guenther, M. R. Kozlowski, B. E. Newnam, and M. J. Soileau, eds., vol. 2714 of SPIE Proceedings, pp. 202�??210 (SPIE, 1996). (Boulder, CO, USA, 30 Oct. 1995).

Quantum Electron. (1)

S. I. Yakovlenko, �??Plasma behind the front of a damage wave and the mechanism of laser-induced production of a chain of caverns in an optical fibre,�?? Quantum Electron. 34(8), 765�??770 (2004).
[CrossRef]

Sov. Lightwave Commun. (1)

E. M. Dianov, V. M. Mashinskii, V. A. Myzina, Y. S. Sidorin, A. M. Streltsov, and A. V. Chickolini, �??Change of refractive index profile in the process of laser-induced fiber damage,�?? Sov. Lightwave Commun. 2, 293 (1992).

Supplementary Material (3)

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Figures (8)

Fig. 1.
Fig. 1.

Macroscopic view of fiber fuse propagation through a single-mode silica fiber pumped by a 9.0 W and 1.48 μm laser light (1.00 MB). The speed is about 1.2 m/s.

Fig. 2.
Fig. 2.

Experimental setup for observing fiber fuse propagation.

Fig. 3.
Fig. 3.

Microscopic view of fiber fuse propagation pumped at various laser powers (1.48 μm) ranging from 1.5 to 9.0 W (1.64 MB). Original gray-scale images are converted to color-scale ones.

Fig. 4.
Fig. 4.

Images captured form the ultrahigh-speed video shown in Fig. 3(a) and intensity profiles along the dashed line in each image (b). The pump laser powers are (1) 9.0 W, (2) 7.0 W, (3) 5.0 W, (4) 3.5 W, (5) 2.0 W, and (6) 1.5 W. Each horizontal arrow indicates the distance that the optical discharge moves in 40 μs (10 frames).

Fig. 5.
Fig. 5.

Pump power dependence of fusing speed, v, void interval, d (left), and various lengths of optical discharge and large front void (right). ▲: the peak width at 10% height of the intensity profile of the optical discharge along the fiber length, ∆10%, shown in Fig.4; ○: the diameter of the large front void, 2r ; □ and thin vertical bars: the length not including the bridge; thick vertical bars: the length including the bridge.

Fig. 6.
Fig. 6.

Optical micrographs showing the front part of the fiber fuse damage generated in single-mode silica glass fibers. The pump laser powers are (a) 9.0 W, (b) 7.0 W, (c) 5.0 W, (d) 3.5 W, (e) 2.0 W, (f) 1.5 W, (g) ~1.3 W, and (h) ~1.2 W. The thin two lines at the top and bottom of (a) and (e) are the edges of the fiber, whose diameter is 125 μm. The height of the figures except for (a) and (e) correspond to 50 μm.

Fig. 7.
Fig. 7.

A series of optical micrographs showing the damage generated by 5.0 W laser light and an edited video of these images (1.58 MB). The interval of the vertical lines is 17.8 μm. The micrograph at the bottom is the same as that at the top, shifted 17.8 μm to the left. The viewing speed of the video is about 50,000 times slower than the propagating speed of the 5.0-W-pumped optical discharge.

Fig. 8.
Fig. 8.

Optical micrographs showing the damage including periodic voids only generated by about 1.3 W laser light. The height of the figure corresponds to 50 μm.

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