Data Center Test and Measurements

What you should know to choose a data center OTDR

With the technological evolution occurring in datacenters, test requirements dramatically changed for the ber networks that connect mission-critical servers, networking and storage devices. Selecting the proper OTDR to test your network not only strengthens its reliability, but also improves how quickly and ef ciently the job is done, as well as documenting the quality of […]

FTTH Network

Оптический рефлектометр

Опти́ческий рефлекто́метр (англ. OTDR, Optical Time Domain Reflectometer) — прибор для измерения параметров волоконно-оптических линий передачи (ВОЛП). Принцип работы прибора основан на анализе отражённых оптических импульсов, излучаемых рефлектометром в оптическое волокно. Измерения с помощью оптического рефлектометра основаны на явлении обратного рассеяния света в волокне и на отражении света от скачков показателя преломления. Импульсы света, распространяясь […]

Test and Measurements

что делает OTDR?

OTDR (Optical Time-Domain Reflectometer, оптический рефлектометр временной области) сертифицирует характеристики заново установленных оптических линий связи и определяет проблемы в уже существующих. OTDR измеряет характеристики оптического волокна, выводит в графическом виде отраженный оптический сигнал по всей длине линии и предоставляет таблицу параметров всех оптических событий, обнаруженных в линии связи. Измерительный процесс включают в себя измерение общего […]

Test and Measurements

Smart SFP with integrated OTDR

Transition Networks, Inc. has unveiled the TN-SFP-BCxxxx line of Smart SFPs, gigabit optical transceivers with integrated optical time-domain reflectometer (OTDR) capabilities. The optical modules can help detect fiber breaks while performing typical transceiver functions. They also can locate such breaks within 10 m. On the transceiver end of things, the Smart SFPs support 1550-nm wavelengths […]

Test and Measurements

Introduction to BOTDR

B-OTDR Brillouin reflectometer BOTDR (Brillouin optical time domain reflectometer). Another kind of reflectometers is based on the Brillouin scattering. In the typical reflectometers the Rayleigh scattering is employed for analysis. The BOTDR reflectometer utilizes the phenomenon of the inelastic Brillouin scattering, related to generation of acoustic wave at frequency fB. The signal resulting from the […]

FTTH Network

Fiber Characterization by Fiber Optic Test Equipment

The following specification is the fiber testers and specification for a cable before delivery. 1. Optical Time-Domain Reflectometer (OTDR) — sends a laser pulse through the fiber and detects the return signal strength as well as the transmitting time. This test shows the overall character of the fiber strand including splice loss, splice numbers, connectors, […]

Test and Measurements

Kriterien zur Auswahl eines optischen Reflektometers (OTDR)

Dieses White Paper enthält wichtige Informationen zu optischen ZeitbereichReflektometern (OTDR). Weiterhin erläutert es Neueinsteigern auf dem Glasfasermarkt für Telekommunikationsanwendungen die Kriterien zur Auswahl eines OTDRs, das ihren spezifischen Testanforderungen gerecht wird. Was ist ein OTDR? Ein OTDR ist ein Glasfasertester zur Charakterisierung von optischen Netzwerken, die Telekommunikation sanwendungen unterstützen. Die Aufgabe des OTDRs besteht darin, […]

FTTH Network

Macrobend Detection Using an OTDR

On a transmission network, one cause of insertion loss on a fiber link is macro bending. This is commonly caused by tight installation or handling. As Fiber-to-the-Home (FTTH) networks lead to a significant increase of fiber installation in the last mile, the space constraints become increasingly stringent. This is driving the need for distributions hubs […]

Test and Measurements

Splice Loss Test Standards

Standards relating to splice loss measurement methods and test equipment are summarized in Appendix B. Again, we identified a number of important gaps: TIA 455-34A, the most widely recognized and comprehensive standard, does not mention the geometry error or nominal tolerances for test fibers, e.g. core concentricity, which is specified in Telcordia GR-765. Neither standard addresses […]

Data Center FEATURES Test and Measurements

Cabling and Test Considerations for 10 Gigabit Ethernet (10 GigE) Local Area Networks

Introduction Current communication data rates in local networks range from 10/100 megabits per second (Mbps) in Ethernet to 1 gigabit per second (Gbps) in fiber distributed data interface (FDDI) and Gigabit Ethernet (GigE). However, the increasing demand for internet protocol (IP)-based services including voice, video, and data requires higher speeds and greater bandwidth, leading to […]