Single-polarization fiber with a high extinction ratio.
An elliptical-core hole assisted single-polarization fiber was designed, fabricated, and characterized. Numerical modeling based on the vectorial Maxwell equation reveals the dependence of the single-polarization bandwidth on core delta and air-hole size. Several single-polarization fibers based on this design with their single-polarization operating windows centered between 0.9 and 1.5 microm were successfully demonstrated. A correlation between fiber birefringence and single-polarization operating bandwidth is qualitatively confirmed. A single-polarization bandwidth as high as 55 nm was observed. These fibers also show very high extinction ratios of 60 dB or higher at lengths much shorter than 1 m. Other properties such as the dependence on length of the single-polarization operating window were also measured.
Nolan
Daniel A
DA
Corning Incorporated, Corning, New York 14831, USA. nolanda@corning.com
Berkey
George E
GE
Li
Ming-Jun
MJ
Chen
Xin
X
Wood
William A
WA
Zenteno
Luis A
LA