Fiber Optic connector - LEMO - #9

Text version of the page

Untitled table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:4.00pt "Arial", sans-serif; } .font1 { font:5.00pt "Arial", sans-serif; } .font2 { font:6.00pt "Arial", sans-serif; } .font3 { font:7.00pt "Arial", sans-serif; } .font4 { font:8.00pt "Arial", sans-serif; } .font5 { font:9.00pt "Arial", sans-serif; } .font6 { font:11.00pt "Arial", sans-serif; } .font7 { font:13.00pt "Arial", sans-serif; } .font8 { font:4.00pt "Georgia", serif; } .font9 { font:12.00pt "Georgia", serif; } Introduction This catalog gives the complète description of LEMO fibre optic connectors. Our manufacturing program has been extended to 12 series with specific mating and environmental characteristics. Each series includes a wide variety of plugs, sockets or housings for electro-optic devices available in a large choice of combinations of fibre optic and electrical contacts within the same housing. Shells are adapted to all round cables to a maximum dia-meter of 25 mm. LEMO connectors feature ceramic or metal ferrules for the fibre optic contacts to provide alignment for both single-mode and multi-mode fibres. They are manufactured to the highest precision in order to ensure optimum optical performances even in the most severe applications. Numerous accessories as well as a complete range of tools for fibre optic termination, are available. The 00 Series The characteristic feature of this connector series is the small size requiring minimum mounting space requirement. Connectors are suitable for use with single fibre cables fitted with single-mode or multi-mode fibres. The 0B Series A simple and proven construction with ceramic or metallic ferrules in a fibre optic contact primarily intended for use with large size multi-mode fibres ranging from 140 to 1500 micron external diameters. The 0K Series This series is watertight (IEC 60529/IP 66-IP 68) and is ideal for use in harsh environments. It uses the standard LEMO F2 fibre optic contact which has undergone extensive mechanical, optical and envi-ronmental testing. Connectors are suitable for use with single fibre cables fitted with single-mode or multi-mode fibres. The 2B to 5B Series These connectors series range from 2B to 5B, and have been designed to work with LEMO F1 or F2 type fibre optic contacts. They are suitable for use with multi fibre or mixed fibre optical/electrical cables fitted with single-mode or multi-mode fibres up to 1500 micron in diameter. The connectors offer a variety of features: - alignment key preventing all errors in alignment; - polarized keying system, the various keying alterna­tives prevent unwanted cross mating of otherwise similar connectors; - higher contact density; and - possible use of crimp contacts to reduce cable assem-bly time. The 2K to 5K Series This product family includes the 2K to 5K series, and are watertight (IEC 60529/IP 66-IP 68) available in the same types as the 2B to 5B series. The connectors are ideal for use in harsh environments. The video HDTV 3K.93C Series This new range of high performance fibre optic camera connectors has been developed to meet the needs of the new generation of digital TV cameras. Contact configura­tion includes 2 fibre optic contacts for single-mode fibres, 2 electrical contacts for power and 2 electrical contacts for signal. This series conforms to the Japanese ARIB technical report BTA S-1005B, to the ANSI/SMPTE 304 M-1998 and 311M-1998 standards and to the European EBU Technical Recommendation R100-1999. Connectors are qualified for use in UL approved equip-ment such as those specified in UL 1419 «Professional Video and Audio Equipment» CE marking £ £ CE marking C € means that the appliance or equipment bearing it complies with the protection requirements of one or several European safety directives. CE marking C € applies to complete products or equipment, but not to optical/electromechanical com-ponents, such as connectors. Propagation of Light and Fibre Type The diagrams show the typical transmission characte-ristic of single-mode and multi-mode fibres. In multi-mode fibres, the effect of modal dispersion causes a spread in the received pulse and therefore limits the bandwidth of the transmission system (Fig. 1). If the fibre core is < 10 Lim and the wavelength is > 1300 nm, then only the fundamental mode is transmitted in the single-mode fibre (Fig. 2). The dispersion effects of single-mode fibres are very small and consequently they offer higher bandwidths when compared with multi-mode fibres. However, multi-mode fibres are usually ideal for short distance applica­tions because they require less input optical power and can be driven by simple low cost LEDs. Cross section Fig. 1 Multi-mode fibre Typical step index a T3 CD<= 2 ivro itt ■50- E Propagation in the fibre Received pulse CD >fc CD DR X "iCD CD £ CO .E Ha. Core Cladding AE AA T E =L o co co 200 iim n i Fig. 2 Single-mode fibre AE Core Cladding AE n 7