James A. Harrington and Yuji Matsuura, Rutgers University, Piscataway, N.J.
Anew class of hollow glass waveguides has been developed for the delivery of both broadband and infrared laser energy. These hollow waveguides have the advantages of high power thresholds, low insertion loss, no end reflection, ruggedness, and small beam divergence. While these waveguides were initially developed for CO2 laser power delivery, they are today one of the most attractive alternatives for the transmission of infrared radiation for broadband spectroscopic and radiometric fiber sensors as well as for laser power delivery in surgical and industrial applications.
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