Title:
POLARIZATION-MAINTAINING FIBER
Document Type and Number:
WIPO Patent Application WO/2023/145862
Kind Code:
A1
Abstract:
A polarization-maintaining fiber (1) comprises a core (11), a pair of stress-applying parts (12a, 12b) that are positioned on both sides of the core (11), and cladding (13) that encloses the core (11) and the pair of stress-applying parts (12a, 12b). The polarization-maintaining fiber (1) exhibits a bending loss of at most 7 dB at a wavelength of 1.55 µm when bent to a bending radius of 5 mm and twisted on the order of one revolution per 31.4 mm of fiber length. It is thus possible to obtain a polarization-maintaining fiber in which bending loss can be suppressed to a level that can stand up to normal use, even if subjected to the degree of twisting that can occur during normal use.
Inventors:
SASAKI YOSHIKAZU (JP)
HAYASHI KAZUYUKI (JP)
MATSUO SHOICHIRO (JP)
HAYASHI KAZUYUKI (JP)
MATSUO SHOICHIRO (JP)
Application Number:
PCT/JP2023/002603
Publication Date:
August 03, 2023
Filing Date:
January 27, 2023
Export Citation:
Assignee:
FUJIKURA LTD (JP)
International Classes:
G02B6/024
Domestic Patent References:
| WO2008007743A1 | 2008-01-17 |
Foreign References:
| JP2003337238A | 2003-11-28 | |||
| JPS6356614A | 1988-03-11 | |||
| JP2015184371A | 2015-10-22 | |||
| JP2007108261A | 2007-04-26 | |||
| JP2002158384A | 2002-05-31 | |||
| US20080095199A1 | 2008-04-24 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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