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Photonic Crystal Fibers

Photonic Crystal Fibers
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385 Email: sales@newport.com • Web: newport.com P h o t o n i c s a n d I n s t r u m e n t a t i o n Photonic Crystal Fibers Newport's Photonic Crystal Fibers (PCFs) can provide characteristics that ordinary optical fiber cannot, such as: single mode operation from the UV to IR with large mode-field diameters, highly nonlinear performance for super continuum generation, numerical aperture (NA) values ranging from very low to about 0.9, optimized dispersion properties, and air core guidance, among others. Applications for PCFs include spectroscopy, metrology, biomedicine, imaging, telecommunication, industrial machining, and military. PCFs are generally divided into two main categories: Index Guiding fibers that have a solid core, and Photonic Bandgap fibers that have periodic microstructured elements and a core of low index material (e.g. hollow core). A Classification tree is shown below in Fig. 1. Newport offers F-SM Series Large Mode Area PCFs, F-NL Series Nonlinear PCFs, and F-AIR Series Photonic Bandgap or Air Guiding fibers, manufactured by Crystal Fibre, the biggest commercial supplier of photonic crystal fibers. Also offered are the Photonic Crystal Fiber Starter Kit (F-PCF-KIT) and, the newest addition, SCG-800 self contained Supercontinuum Generator. Please refer to our Fiber Tutorial Section for more detailed information on the properties of Photonic Crystal Fibers. Overall terms: Photonic Crystal Fibre (PCF) Micro structured Fiber (MSF) Micro structured Optical Fiber (MOF) Main classes: Subclasses: High-Index Core Index-Guiding Holey Hole-assisted Photonic Band Gap (PBG) Bandgap Guiding High NA Large Mode Area Highly Nonlinear Low-index Core Air Guiding Hollow Core Fig. 1 - Overview of the various classes of Photonic Crystal Fibers Index Guiding PCF Large Mode Area PCFs (F-SM Series) The F-SM Series PCFs are un-doped silica fibers that use a triangular pattern of air holes to form the cladding. Since the index contrast between the core and the cladding, Än, is determined only by the geometry of the air holes, it is possible to fabricate fibers with a very small and accurate Än, and thus obtain very low numerical apertures and very large mode areas. Furthermore, this type of fiber is single-mode over a very broad wavelength range, with a practically constant mode-field diameter (MFD). At short wavelengths, the fibers' performance is limited by macro-bending losses, which determines the practical wavelength range for applications. The F-SM series of fibers are optimized in order to obtain the largest possible MFD without introducing significant macrobending losses on typical bending radii of more than 16 cm. See graphs in the Specifications Section below. Applications Free Space Coupling and Handling The F-SM Series PCFs are typically used where single-mode, high-power delivery is required without introducing non-linear effects. Furthermore, they are the optimal choice for applications requiring singlemode guidance in a very broad wavelength range, e.g. in sensors, spectroscopy, interferometry or RGB displays. Coupling light into and out of an F-SM fiber is as simple as for standard dopedglass optical fibers. In a free-space setup, the optics should match the NA of the fiber and be diffraction limited in order to obtain a low-loss coupling. Since the MFD is practically constant, the NA is proportional to the wavelength, which should be considered in the design of coupling optics for a broad wavelength range. The F-SM Series may also be spliced to standard fibers (available on a semi-custom basis), making them easy to integrate into existing systems or instruments. Optional beam expansion FC connectors enhance high power capabilities. Nonlinear PCFs (F-NL Series) Nonlinear PCFs are of the high-indexguiding type (see Fig. 1), and they are designed with a small core to get a high nonlinear coefficient. The air-filled microstructured cladding region of nonlinear photonic crystal fibers lends this fiber type several advantages compared to standard technology stepindex fibers. The high index difference between the silica core and the air-filled microstructure enables tight mode confinement resulting in a low effective area and thereby a high nonlinear coefficient. The air-filled region also results in strong wavelength dependence POLARIZATION MEASUREMENT AND CONTROL LASER DIODE CONTROL LASER DIODE MOUNTS FIBER OPTIC COMPONENTS OPTICAL FIBERS AND ACCESSORIES EDUCATIONAL KITS

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386 Phone: 1-800-222-6440 • Fax: 1-949-253-1680 P h o t o n i c s a n d I n s t r u m e n t a t i o n POLARIZATION MEASUREMENT AND CONTROL OPTICAL FIBERS FIBER OPTIC COMPONENTS LASER DIODE MOUNTS LASER DIODE CONTROL AND ACCESSORIES EDUCATIONAL KITS in the characteristics of the fiber and is responsible for the large wave-guide dispersion possible in such fibers. The wave-guide dispersion can be used to enhance or cancel out the material dispersion in the fiber and the flexibility in terms of dispersion profile is therefore much bigger in PCFs than in standard fibers. Changing the design of...

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387 Email: sales@newport.com • Web: newport.com P h o t o n i c s a n d I n s t r u m e n t a t i o n F-SM Series Specifications F-SM8 F-SM10 F-SM15 F-SM20 F-SM25 F-SM35 Cladding Diameter (ìm) 125 ± 5 125 ± 2 230 ± 5 229.5 ± 5 285 ± 5 283 ± 5 Coating Diameter (ìm) 245 ± 10 240 ± 5 405 ± 10 340 ± 10 430 ± 10 426 ± 10 Buffer Coating Material Single layer acrylate Core Diameter (ìm) 8.5 ± 0.3 10 ± 1 15 ± 0.5 20 ± 0.4 24.5 ± 0.4 35 ± 0.5 Recommended minimum wavelength (nm) 260 400 450 700 950 1450 Cut-Off Wavelength None Mode Field Diameter (ìm) 6.0 ± 1.0 7.5 ± 1.0 11.5 ± 1.5 15.0 ± 1.5 18.5 ±...

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388 Phone: 1-800-222-6440 • Fax: 1-949-253-1680 P h o t o n i c s a n d I n s t r u m e n t a t i o n POLARIZATION MEASUREMENT AND CONTROL OPTICAL FIBERS FIBER OPTIC COMPONENTS LASER DIODE MOUNTS LASER DIODE CONTROL AND ACCESSORIES EDUCATIONAL KITS Photonic Crystal Fiber Pricing Model Description F-SM8 Endlessly Singlemode PCF, 8.5 ìm Core F-SM10 Endlessly Singlemode PCF, 10 ìm Core F-SM15 Endlessly Singlemode PCF, 15 ìm Core F-SM20 Endlessly Singlemode PCF, 20 ìm Core F-SM25 Endlessly Singlemode PCF, 25 ìm Core F-SM35 Endlessly Singlemode PCF, 35 ìm Core F-SM5-PM Endlessly Singlemode PCF,...

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Photonic Crystal Fibers 4Pages

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Photonic Crystal Fibers
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