The difference between SFP dual fiber and BIDI, the difference between single mode and multi mode

The difference between SFP dual fiber and BIDI Number of optical ports The single-fiber optical module has only one optical port, and is filtered by WDM technology and filtering technology in the optical module. It implements an optical port to receive information and send information. Therefore, single fiber modules must be used in pairs. Single-fiber optical modules operate with the largest savings in fiber resources. However, the dual-fiber optical module has two optical ports that can receive and transmit simultaneously. Two fiber connections are required. 2.Different wavelengths BIDI SFP Low speed: TX1310/RX1550nm; TX1550/RX1310nm; TX1490/RX1550nm; TX1550/RX1490nm; TX1310nm/Rx1490nm; TX1490nm/Rx1310nm 10G SFP+ : TX1270/RX1330nm; TX1330/RX1270nm Dual optical module Low speed ：850nm；1310nm；1550nm 10G optical module：850nm；1310nm；1550nm 3.Different prices The price of a single fiber optical module is higher than that of a dual fiber optical module. The optical module of a single fiber needs to receive and transmit on one optical port, and saves half of the optical fiber resources compared with the dual fiber optical module. SFP single mode and multimode difference Transmission distance Single-mode optical modules are often used for long-distance transportation, and the transmission distance is generally 150-200km. However, multimode is used for short-distance transmission, generally below 2km. Different wavelengths The wavelength of a single-mode optical module is generally: 1310 nm, 1550 nm. The wavelength of a multimode optical module is generally: 850 nm 3.The different prices Single-mode optical modules have higher transmission distances and applications than multimodes due to different rates and wavelengths, so the price of a single module is higher than that of a multimode optical module. 4.The different light sources The light source of the single mode optical module is an LD or an LED with a narrow spectral line, and the light source of the multimode optical module is a light emitting diode or a laser. The above is the difference between the optical modules. The various optical modules mentioned are sold by our company. If you want to know more professional information, please feel free to contact Fiberland Ltd.