Method of modifying an optical waveguide and waveguide so...

Details Method of modifying an optical waveguide and waveguide so... Method of modifying an optical waveguide and waveguide so...

B - Operations, Transporting

23

K

325/1, 26/128, 8

B23K 26/00 (2006.01) C03B 37/14 (2006.01) C03B 37/15 (2006.01) G02B 5/18 (2006.01) G02B 6/255 (2006.01)

Patent

CA 1320820

ABSTRACT (ref Fig 1) Method of modifying an optical waveguide an waveguide so modified A method of structurally modifying a silica monomode optical fibre (4) by launching optical power into the fibre (4) from a Nd:YAG laser operating at 1.064um and raising the temperature of a portion of the fibre (4) by bringing a metal film (12) into contact with a polished half-coupler block (6) to absorb energy from the laser (2). A structural modification of the fibre is initiated which propagates towards the laser (2) sustained by the optical power. It provides a means of decommissioning an optical fibre. The modified optical fibre (4) has regular periodic damage sites which can be used to form a diffraction grating. The method may also be used as an optical power limiter to protect optical networks from too high optical power inputs.

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