Abstract

A new type of launching coupler for small-bore, hollow fibers, consisting of a lens and a tapered hollow waveguide, is proposed to increase the alignment tolerance between an input laser beam and small bore fibers. First, we designed the structural dimensions of the coupler by using a ray-tracing method. Then, a series of experiments employing tapered hollow waveguides made of Pyrex glass was performed to investigate the effectiveness of the new coupler. It is shown that the coupler has a high efficiency with attenuation of around 0.5 dB, especially when the inside of the taper section is coated with a polymer and silver film. In addition, we also show that the coupler has great tolerance for the transverse displacement of a waveguide axis, which gives a 0.1-dB loss increase for a 300-µm displacement.

© 1997 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Flexible small-bore hollow fibers with an inner polymer coating

Yukio Abe, Yi-Wei Shi, Yuji Matsuura, and Mitsunobu Miyagi
Opt. Lett. 25(3) 150-152 (2000)

Small-bore hollow waveguides for delivery of 3-μm laser radiation

Rebecca L. Kozodoy, Antonio T. Pagkalinawan, and James A. Harrington
Appl. Opt. 35(7) 1077-1082 (1996)

Hollow-fiber delivery of high-power pulsed Nd:YAG laser light

Yuji Matsuura, Konosuke Hanamoto, Shunichi Sato, and Mitsunobu Miyagi
Opt. Lett. 23(23) 1858-1860 (1998)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription