Specialty Optical Fibers Handbook

to successfully remove a large malignant tumor from the bronchus intermedius

of a patient with lung cancer [53].

10.3.2 Potential Telecom Applications

Various oxide glasses have material absorption losses below 100 dB/km and

indices of refraction near 1.6 at the typical telecom wavelengths. When combined

with the high-index glass formed from As

2

Se

3

, a very low loss OmniGuide fiber

can be produced. Indeed, with approximately 20 bilayers and the proper choice

of the hollow-core radius, the theoretical loss for the TE

01

mode is below

0.01 dB/km [24]. Losses this low would reduce the number of relatively expensive

amplifier modules needed in long-haul systems, changing the fundamental eco-

nomics of this market. In addition, nonlinear effects in the hollow ...