Xem 1-20 trên 46 kết quả Optical fibres
  • The optical fibre technology is one of the hop topics developed at the beginning of the 21th century and could do many services for application dealing with lighting, sensing and communicating systems. Many improvements have been carried out since 30 years to reduce the fibre attenuation and to improve the fibre performance. Nowadays, new applications have been developed over the scientific community and this book titled “Optical Fibre, New Developments” fits into this paradigm.

    pdf0p 123859674 30-06-2012 48 7   Download

  • PERFORMANCE TESTING OF OPTICAL FIBRE LINKS FOR COMPLIANCE TO ISO/IEC 11801 Using the test methods set out in ISO/IEC 14763-3 - Testing of optical fibre cabling Main changes from previous Version 6; Item 8 3-Test Cord Method for Reference Setting is default method Item 10 Field Calibration Cord, Launch & Tail Cords shall all have Reference Connectors Item 11 Method of Removal of Field Calibration Cord Adaptors for Link Testing Item 14 Insertion Loss for Reference and Non-Reference Connectors Item 15 Example of Loss Budget Calculation Updated for Reference Connectors Item 16 Links of 1/10GBE ...

    pdf12p qd-tek 28-04-2010 59 5   Download

  • Tham khảo tài liệu 'optical fibre, new developments part 4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf35p 181024119877 17-02-2012 17 5   Download

  • Tham khảo tài liệu 'optical fibre, new developments part 1', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf35p 181024119877 17-02-2012 18 4   Download

  • Tham khảo tài liệu 'optical fibre, new developments part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf35p 181024119877 17-02-2012 18 4   Download

  • Tham khảo tài liệu 'optical fibre, new developments part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf0p 181024119877 17-02-2012 16 4   Download

  • Tài liệu tham khảo về Performance testing of optical fibre links

    pdf7p qd-tek 28-04-2010 67 3   Download

  • Tham khảo tài liệu 'optical fibre, new developments part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf0p 181024119877 17-02-2012 18 1   Download

  • The use of fibre optic sensors in structural health monitoring has rapidly accelerated in recent years. By embedding fibre optic sensors in structures (e.g. buildings, bridges and pipelines) it is possible to obtain real time data on structural changes such as stress or strain. Engineers use monitoring data to detect deviations from a structure’s original design performance in order to optimise the operation, repair and maintenance of a structure over time.

    pdf272p kennybibo 14-07-2012 57 17   Download

  • This edition of Optical Metrology contains a new chapter about computerized optical processes, including digital holography and digital speckle photography. Chapter 2, on Gaussian optics, and Chapter 5, on light sources and detectors, are greatly expanded to include descriptions of standard imaging systems, light-emitting diodes and solid-state detectors. Separate new sections on optical coherence tomography, speckle correlation, the Fast Fourier Transform, temporal phase unwrapping and fibre Bragg sensors are included. Finally, a new appendix about Fourier series is given.

    pdf374p thix1minh 16-10-2012 25 9   Download

  • The Quad Fibre Loop Converter* (QFLC) system is a cost-effective optical multiplexer that transports four E1s over two singlemode fibres. The QFLC system can be configured to maximize facility utilization for point-to-point or point-to-multipoint topologies. The QFLC system can also be used for fibre ring networks for both dual-feed and single-feed applications to a customer. The QFLC system accepts standard electrical E1 signals and can be used in a stand-alone configuration with any approved multiplexer or network element that generates a standard E1 (6.703 Mbps) signal.

    pdf15p batrinh 11-08-2009 89 6   Download

  • ADC has designed a family of Fibre Loop Converters (FLCs) that provide a cost-effective alternative to deploying service over copper while avoiding the high capital investment of primary multiplexers and Fibre optic terminals. This family includes products designed for economical distribution of single or multiple 2.048 Mb signals. The E1 Quad FLC multiplexes up to four 2.048 Mb signals for transport over two fibres at typical distances of 72 Km (44 miles). The E1 QFLC system consists of a rack mounted central exchange shelf and a wall or rack mounted customer premises shelf.

    pdf8p minhtuan 10-08-2009 163 4   Download

  • Yêu cầu kỹ thuật Cáp sợi quang. Tiêu chuẩn này áp dụng đối với các loại cáp sợi quang bao gồm cáp chôn trực tiếp, cáp kéo cống và cáp treo sử dụng trên mạng viễn thông Việt Nam. Tiêu chuẩn này làm cơ sở cho việc đánh giá và lựa chọn cáp sợi quang.

    pdf0p banvatoi_2312 26-10-2010 157 67   Download

  • Digital communications is a rapidly advancing applications area. Significant current activities are in the development of mobile communications equipment for personal use, in the expansion of the available bandwidth (and hence information carrying capacity) of the backbone transmission structure through developments in optical fibre, and in the ubiquitous use of networks for data communications.

    pdf1073p meoyeuagu 21-05-2013 44 26   Download

  • The oscillator in communication and measurement systems, be they radio, coaxial cable, microwave, satellite, radar or optical fibre, defines the reference signal onto which modulation is coded and later demodulated. The flicker and phase noise in such oscillators are central in setting the ultimate systems performance limits of modern communications, radar and timing systems. These oscillators are therefore required to be of the highest quality for the particular application as they provide the reference for data modulation and demodulation. ...

    pdf56p doroxon 16-08-2010 74 18   Download

  • ADC Communications (Australia) Pty Limited (hereinafter “the Company”) is a sale and manufacturing organisation and offers advice to its authorised installers and their customers. The information and diagrams contained in this document is for illustration purposes only (as at the document date) and does not purport to give specific advice or guidance to meet the requirements of a particular installation. Any design layout or bill of materials based on this document is for illustrative purposes only and does not form a legally binding contract with the Company.

    pdf22p vinhnghi 18-08-2009 83 13   Download

  • Physical measurement dimensions, such as temperature or pressure and tensile forces, can affect glass fibres and locally change the characteristics of light transmission in the fibre. As a result of the damping of the light in the quartz glass fibres through scattering, the location of an external physical effect can be determined so that the optical fibre can be employed as a linear sensor. Light scattering, also known as Raman scattering, occurs in the optical fibre.

    ppt53p gacon89 13-06-2010 66 11   Download

  • Tham khảo sách 'fibre optic methods for structural health monitoring branko', kỹ thuật - công nghệ, kiến trúc - xây dựng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf272p chipmoon 19-07-2012 32 9   Download

  • Optical Amplifiers As seen in Chapter 5, the transmission distance of any fiber-optic communication system is eventually limited by fiber losses. For long-haul systems, the loss limitation has traditionally been overcome using optoelectronic repeaters in which the optical signal is first converted into an electric current and then regenerated using a transmitter. Such regenerators become quite complex and expensive for wavelength-division multiplexed (WDM) lightwave systems.

    pdf53p khinhkha 29-07-2010 37 8   Download

  • Optical Fibers The phenomenon of total internal reflection, responsible for guiding of light in optical fibers, has been known since 1854 [1]. Although glass fibers were made in the 1920s [2]–[4], their use became practical only in the 1950s, when the use of a cladding layer led to considerable improvement in their guiding characteristics [5]–[7]. Before 1970, optical fibers were used mainly for medical imaging over short distances [8]. Their use for communication purposes was considered impractical because of high losses (∼ 1000 dB/km).

    pdf54p khinhkha 29-07-2010 40 7   Download

Đồng bộ tài khoản