Results 201 to 210 of about 8,929 (253)

Defocused illumination with beam-shaping condenser for uniform wide-field X-ray imaging. [PDF]

J Synchrotron Radiat
Zhang K, Luo Y, Di Y, Guo C, Li C, He M, Zhang C, Peng F, Liu W, Wu Z, Guan Y, Tian Y, Liu G.   +12 more
europepmc   +1 more source

Coherence evaluation and first demonstration of multi-contrast X-ray computed tomography on NanoTerasu BL09W with an X-ray Talbot interferometer. [PDF]

J Synchrotron Radiat
Ueda R, Liang X, Kamezawa C, Sumiishi H, Bishago Y, Nishio T, Yoshida J, Daimon M, Hiramoto S, Voegeli W, Shirasawa T, Vagovič P, Yamane H, Nakamura T, Yashiro W.   +14 more
europepmc   +1 more source

Long-period gratings in chalcogenide fibers

Optics Express, 2006
We report the first demonstration of long period gratings in single mode As(2)Se(3) chalcogenide glass fiber. The grating is implemented by pressing a threaded rod against a short piece of fiber. Its strength can be tuned over a 25 dB range, has high repeatability, and is fully reversible.
Eric C Magi, Benjamin J Eggleton
exaly   +3 more sources

Some of the next articles are maybe not open access.

Related searches:

Long-period fiber gratings based on periodic microbends

Optics Letters, 1999
We demonstrate a new type of high-performance long-period fiber grating based on arc-induced periodic microbends. The fabrication method is simple and does not require special fibers. Flexibility in controlling the filter parameters makes it possible to produce arbitrary filter profiles by use of a simple apodization technique, which is difficult to do
In Kag Hwang, Seok Hyun Yun, Byoung Yoon Kim   +2 more
exaly   +3 more sources

Long-period waveguide gratings

Proceedings of the Sixth Chinese Optoelectronics Symposium (IEEE Cat. No.03EX701), 2004
Long period waveguide gratings (LPWG) based on a low-loss negative tone epoxy Novolak resin polymer have been fabricated on SiO/sub 2//Si substrate using standard cleanroom processes: UV photolithography and reactive ion etching. A maximum attenuation of -18 dB and a minimum 3 dB bandwidth of 6 nm were measured, and the grating length is as short as 1 ...
H.C. Tsoi, W.H. Wong, E.Y.B. Pun
openaire   +2 more sources

Long-period grating fabrication techniques

SPIE Proceedings, 2000
Electric discharge and CO2 laser exposure can produce long period gratings in standard telecommunication fibers. These two fabrication techniques are examined and compared to the UV laser exposure technique. Cladding modes involved in these gratings have been measured and identified using a computer simulation based on coupled mode equations ...
Marc Verhaegen, P. Orsini, D. Perron, Xavier Daxhelet, Suzanne Lacroix   +4 more
openaire   +1 more source

Reliability of long-period gratings

OFC '98. Optical Fiber Communication Conference and Exhibit. Technical Digest. Conference Edition. 1998 OSA Technical Digest Series Vol.2 (IEEE Cat. No.98CH36177), 2002
Summary form only given. Ever since their conception in 1996, long-period gratings (LPGs) have come to be used in a wide variety of applications. LPGs involve coupling of core and cladding modes. The importance of thermal stabilization techniques for successful use of Bragg gratings is now well acknowledged. This is even more important in LPGs, because
S. Kannan, L. Copeland, J. Judkins, M. LuValle, P. Lemaire   +4 more
openaire   +1 more source

Cascaded long-period gratings with nanostructured coatings

Optics Letters, 2005
The response of the transmission spectrum of cascaded long period gratings (LPGs) to the deposition of nanostructured coatings by use of the Langmuir-Blodgett technique is investigated. The phase of the interference fringes within the LPGs' attenuation bands is shown to be highly sensitive to the optical thickness of the coating, for thicknesses of the
Stephen W, James, Imran, Ishaq, Geoffrey J, Ashwell, Ralph P, Tatam   +3 more
openaire   +2 more sources