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Nd:YAG Improves the Fine Print on Fish Tags

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Daniel C. McCarthy

Roughly 50 percent of the salmon issuing from US Pacific Northwest rivers and streams are raised in fish hatcheries; the number is higher in Canada. Once released, these fish often disappear into the ocean depths for years, carrying a tiny coded wire tag from Northwest Marine Technology Inc. These tags can detail the fish's origins, release date and other information in the form of marks made by a frequency-doubled Nd:YAG laser from Cutting Edge Optronics. A solid-state Nd:YAG laser improved the readability and flexibility of codes printed on Northwest Marine Technology's wire tags. The...Read full article

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    Published: August 1999
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