Determination of Crystallographic Axes of Photonic Crystal Fiber by Transversal Scanning Method

Lim, Sun Do; Lee, Sun-Goo; Lee, Kwanil; Lee, Sang Bae

doi:10.1143/jjap.49.102503

Cited by 5 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several studies of the transverse propagation of light through a photonic crystal fiber cladding have already been reported [8][9]. For example, transversely propagating light and the associated scattering pattern can be used to estimate the orientation of MOF air holes relative to the direction of the beam propagation [10][11], to scan photonic band gap properties of the structure [8] or for cryptography purposes [12]. MOF based microfluidic and liquid crystal switchable devices based on light transverse geometry were reported as well [13][14].…”

Section: Introductionmentioning

confidence: 99%

Photonic crystal lenses for transverse focusing of laser illumination in microstructured optical fibers

et al. 2014

View full text Add to dashboard Cite

Transverse light propagation through the air holed cladding of microstructured optical fibers (MOFs) has recently attracted interest owing to its importance for several applications such as fiber grating writing, particle trapping in hollow core fibers, all optical switch devices, etc. The air holes in the MOF cladding region impede efficient delivery of transversely propagating light to the core region when the fiber is illuminated from the outside. To overcome this problem we designed MOFs with a gradient air holed cladding structure that will actually focus transversely propagating light to the fiber core. We used photonic crystal Mikaelian lenses (PCML) as focusing gradient media in the holey cladding. First, we considered and compared several PCML types with varying air hole diameter and air hole pitch, in both hexagonal and rectangular lattices. We studied the design rules of those structures and we carried out a frequency response analysis to identify the most efficient operational regions of the PCMLs. The polarization properties of the considered structures were investigated as well. Finally, we analyzed the transverse coupling properties of the MOF equipped with such a PCML structure in the cladding and we obtained a fiber that clearly focuses transversely incident light to its core region with a normalized focal intensity up to 18, whilst exhibiting good guiding properties.

show abstract

Section: Introductionmentioning

confidence: 99%

Photonic crystal lenses for transverse focusing of laser illumination in microstructured optical fibers

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Two main approaches have been used. In the first the pattern created by scattering of a laser beam was used to derive information about the pitch [9] and the orientation [10,11] of the microstructure, without actually imaging it. In the second, a set of index profiles taken at different fiber orientations was used to tomographically reconstruct the structure [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Real-time Doppler-assisted tomography of microstructured fibers by side-scattering

Stefani¹,

Frosz²,

Wong³

et al. 2014

Opt. Express

View full text Add to dashboard Cite

We introduce the concept of Doppler-assisted tomography (DAT) and show that it can be applied successfully to non-invasive imaging of the internal microstructure of a photonic crystal fiber. The fiber is spun at ~10 Hz around its axis and laterally illuminated with a laser beam. Monitoring the time-dependent Doppler shift of the light scattered by the hollow channels permits the azimuthal angle and radial position of individual channels to be measured. An inverse Radon transform is used to construct an image of the microstructure from the frequency-modulated scattered signal. We also show that DAT can image sub-wavelength features and monitor the structure along a tapered fiber, which is not possible using other techniques without cutting up the taper into several short pieces or filling it with index-matching oil. The non-destructive nature of DAT means that it could potentially be applied to image the fiber microstructure as it emerges from the drawing tower, or indeed to carry out tomography on any transparent microstructured cylindrical object.

show abstract

“…A transverse beam can also be used for particle trapping experiments in hollow core fibers [20]. Understanding how light propagates through a MOF in the direction perpendicular to its axis was also found useful to investigate the structure of the MOF, to determine the angular orientation of the fiber and to analyze fiber tapers [23], [24].…”

Section: Introductionmentioning

confidence: 99%

Photonic Crystal Mikaelian Lenses and Their Potential Use as Transverse Focusing Elements in Microstructured Fibers

et al. 2013

View full text Add to dashboard Cite

We numerically studied the focusing properties of a special type of graded index photonic crystal media, i.e., the so-called photonic crystal Mikaelian lenses (PCMLs). We considered PCMLs with a varying air hole diameter and with a varying air hole pitch in hexagonal and rectangular lattices, and we compared their frequency response and polarization dependence. Our eventual objective is to design microstructured optical fibers equipped with a PCML in their cladding region adapted to allow for more efficient femtosecond laser grating inscription. Therefore, we have also evaluated the possibility of using such lenses as transverse focusing elements in microstructured optical fibers.

show abstract

Determination of Crystallographic Axes of Photonic Crystal Fiber by Transversal Scanning Method

Cited by 5 publications

References 27 publications

Photonic crystal lenses for transverse focusing of laser illumination in microstructured optical fibers

Photonic crystal lenses for transverse focusing of laser illumination in microstructured optical fibers

Real-time Doppler-assisted tomography of microstructured fibers by side-scattering

Photonic Crystal Mikaelian Lenses and Their Potential Use as Transverse Focusing Elements in Microstructured Fibers

Contact Info

Product

Resources

About