Abstract
The authors review the recent advances in fabricating long-period gratings (LPGs) in photonic crystal fibers (PCFs). The novel light-guiding properties of the PCFs allow the demonstration of novel sensors and devices based on such LPGs. The sensitivity of these PCF LPGs to temperature, strain and refractive index is discussed and compared with LPGs made on conventional single-mode fibers. In-fiber devices such as tunable band rejection filters, Mach-Zehnder interferometers are discussed.
Highlights
A long-period grating (LPG) couples light resonantly from the fundamental core mode to a co-propagating higher order core or cladding mode.It is usually formed by periodically perturbing the refractive index or geometry longitudinally along the length of an optical fiber, with a typical period from several hundreds of micrometers to 1 mm
The authors review the recent advances in fabricating long-period gratings (LPGs) in photonic crystal fibers (PCFs)
The resonant wavelength of an LPG written in a PCF decreases with the gratings period Λ, which is contrary to that in a conventional single mode fiber (SMF)
Summary
A long-period grating (LPG) couples light resonantly from the fundamental core mode to a co-propagating higher order core or cladding mode It is usually formed by periodically perturbing the refractive index or geometry longitudinally along the length of an optical fiber, with a typical period from several hundreds of micrometers to 1 mm. PCFs have attracted great interest during the past decade because of its unique properties such as endless single-mode, large mode area, high nonlinearity, and air-core guiding. Such properties are due to the complex index profile and special properties of the photonic crystal cladding. We overview various techniques for fabricating LPGs in PCFs and discuss the applications of these LPGs in sensing and photonic devices
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
