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01223 am a22001813u 4500 |
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13634 |
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|a dc
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|a Hettrick, Simon
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|a Mackenzie, Jacob
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|a Harris, R.D.
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|a Wilkinson, J.S.
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|a Tropper, Anne
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|a Shepherd, David
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|a Ion-exchanged tapered waveguide laser in neodymium-doped BK7 glass
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|c 2000-10-01.
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|z Get fulltext
|u https://eprints.soton.ac.uk/13634/1/2007.pdf
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|a We report what is to our knowledge the first operation of a planar dielectric tapered-waveguide laser. The waveguide laser is fabricated by potassium-ion exchange in Nd<sup>3+</sup> -doped BK7 glass and consists of a single-mode channel waveguide of a few micrometers' width followed by a linear taper up to a broad region with a width of 180µm. A slope efficiency of 42% is found both in the tapers and in standard channel waveguides fabricated upon the same substrate, indicating that the tapers and the channels have similar internal losses; hence the low-loss nature of the tapered beam expansion. The output from either end of the tapered structure is found to be nearly diffraction limited.
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