Numerical analysis of apodized fiber Bragg gratings formation using phase mask with variable diffraction efficiency

Osuch, Tomasz; Jaroszewicz, Zbigniew

doi:10.1016/j.optcom.2010.09.063

Cited by 24 publications

(16 citation statements)

References 6 publications

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“…Imperfect phase masks generate interference patterns which have their periodicity equal to the periodicity of the grating with every second fringe achieving maximum intensity [31]. In between these intensity maxima one can observe peaks of lower intensity and their decrease is dependent on the discretization and fabrication quality of phase levels of the mask.…”

Section: Discussionmentioning

confidence: 99%

“…This in turn affects the concentration of germanium defect centers, the etch rate and finally the surface profile. To assure symmetric grooves it is necessary either place the fiber so that its axis coincides with a multiple of the self-image distance z or to assure that z is considerably greater than the diameter of the taper [31]. The former condition might be hard to achieve, however, the latter one will require the use of phase masks with larger periods.…”

Section: Discussionmentioning

confidence: 99%

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Fabrication of corrugated Ge-doped silica fibers

Wróbel¹,

Stefaniuk²,

Antosiewicz³

et al. 2012

Opt. Express

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Abstract:We present a method of fabricating Ge-doped SiO2 fibers with corrugations around their full circumference for a desired length in the longitudinal direction. The procedure comprises three steps: hydrogenation of Ge-doped SiO2 fibers to increase photosensitivity, recording of Bragg gratings with ultraviolet light to achieve modulation of refractive index, and chemical etching. Finite-length, radially corrugated fibers may be used as couplers. Corrugated tapered fibers are used as high energy throughput probes in scanning near-field optical microscopy. Application to reflection filter fabrication," Appl. Phys. Lett. 32(10), 647 (1978). 14. R. Stöckle, Ch. Fokas, V. Deckert, R. Zenobi, B. Sick, B. Hecht, and U. P. Wild, "High-quality near-field optical probes by tube etching," Appl. Phys. Lett. 75(2), 160-162 (1999). 15. S. K. Mondal, A. Mitra, N. Singh, S. N. Sarkar, and P. Kapur, "Optical fiber nanoprobe preparation for near-field optical microscopy by chemical etching under surface tension and capillary action," Opt. Express 17(22), 19470-19475 (2009 ©2012 Optical Society of America

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Fabrication of corrugated Ge-doped silica fibers

Wróbel¹,

Stefaniuk²,

Antosiewicz³

et al. 2012

Opt. Express

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“…It makes it possible to obtain arbitrary profiles of apodization which directly correspond to the spectral properties of the inscribed FBGs. Another method to get non-homogeneous (apodized) fringe pattern distribution along the grating length is to use a phase mask with variable diffraction efficiency [19][20][21]. 2.…”

Section: Extending the Possibilities Of The Phase Mask Fbg Inscriptiomentioning

confidence: 99%

Development of fiber Bragg gratings technology and their complex structures for sensing, telecommunications and microwave photonics applications

Osuch¹,

Gąsior²,

Markowski³

et al. 2014

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. In this paper research on the development of the fiber Bragg grating (FBG) technology which has been conducted at the Institute of Electronic Systems (IES), Warsaw University of Technology (WUT) since 2004 is presented. In particular the directions in the development of advanced set-ups employing the phase mask inscription scheme are discussed and supported with the descriptions of structures designed and fabricated with the use of the laboratory stages constructed at the IES. The novelty of the presented solutions is based on the combination of numerous techniques of the external modification of the interferometric patterns (projected onto cores of photosensitive fibers to modulate their refractive index) as well as application of the modification of the internal properties of the waveguides themselves by the means of introducing strain or tapering.The development of these sophisticated set-ups resulted in the inscription of FBGs with precisely designed spectral characteristics which found application in telecommunications and sensor technology are also illustrated here.The paper is summarized with the specification of the most important achievements attained at the lab and drafting of the possible directions of further research.

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“…UV light diffracts on a sinusoidal phase mask of grating constants 709 or 1061 nm into +1 st /-1 st diffraction orders of equal intensity. The zero order diffracted beam is not eliminated completely and the Bragg grating period corresponds to the phase mask constant [6]. Figure 2 shows a setup for Bragg grating recording.…”

Section: Bragg Grating Recordingmentioning

confidence: 99%

Preparation of high energy throughput SNOM probes

Wróbel

Stefaniuk

Antosiewicz

et al. 2011

2011 13th International Conference on Transparent Optical Networks

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In this technical note we present technological steps of fabrication of high energy throughput SNOM probes. The core-metal coating interface of probes is corrugated what enhances photon-to-plasmon coupling. A strong evanescent field allows for reduction of aperture diameter, which together with skin depth of metal used for coating decide upon resolution. Probes are made of Ge-doped silica glass fibre, which is hydrogenated to increase its photosensitivity. A Bragg grating is recorded in the cores with UV light diffracted into +1 st /-1 st diffraction orders on a sinusoidal phase mask. Modulation of the refractive index is connected with different etch rates. Etching with the Turner method is made in aqueous solution of HF acid. A corrugated tapered fibre is then coated with aluminium in a special rotating holder. We present results of this novel multi step technology.

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Numerical analysis of apodized fiber Bragg gratings formation using phase mask with variable diffraction efficiency

Cited by 24 publications

References 6 publications

Fabrication of corrugated Ge-doped silica fibers

Fabrication of corrugated Ge-doped silica fibers

Development of fiber Bragg gratings technology and their complex structures for sensing, telecommunications and microwave photonics applications

Preparation of high energy throughput SNOM probes

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