40G BiDi QSFP+: Single-fiber Bidirectional Transmission

The interfaces of optical modules are mainly divided into single-fiber bidirectional BiDi and dual-fiber bidirectional (Deplux). In the wavelength division multiplexing system, the line transmission mode mainly uses single-fiber unidirectional and single-fiber bidirectional.

Single-fiber bidirectional is also called BiDi (Bidirecional), which means that optical signals in two directions can be sent and received simultaneously in one optical fiber. Conventional optical fiber transmission is single-fiber unidirectional, and two optical fibers are required to achieve two-way communication. In contrast, BiDi technology only needs one optical fiber, which doubles the transmission capacity of existing optical fibers, thereby saving optical fiber resources.

However, for BiDi optical modules, the optical modules at both ends of the link must be used in pairs. Generally, optical modules have two ports for transmission and reception, while BiDi optical modules have only one port, which is filtered by the filter in the optical module, and the transmission of TX optical signals and the reception of RX optical signals or vice versa are completed at the same time.

Dual-fiber optical modules have only one wavelength, usually 850nm, 1310nm, 1550nm, etc. Single-fiber optical modules have two different wavelengths, the most common ones are as follows:

BiDi optical modules have a compact structure, and the optical transceiver device is composed of BOSA, which includes detectors and adapters. BOSA combines the two together, and has more filters and bases than TOSA and ROSA components. BiDi optical modules currently support rates of 155M, 1.25G, 10G, 16G, 25G, 40G, 100G, etc.

Since the wavelength used by BiDi optical modules does not produce a large dispersion cost, there is no other difference in transmission indicators from dual-fiber bidirectional optical modules, and the cost has obvious advantages, and there is no need to increase maintenance and management, so the fiber direct connection generally adopts a single-fiber bidirectional solution. At the optical module level, BiDi optical modules and color optical modules both improve the fiber utilization rate to a certain extent, which is also a good choice for users to save costs.

Description

The YXF-QP-M85L-01D is a four-channel pluggable LC duplex QSFP+ fiber optic transceiver for 40 Gigabit Ethernet applications. This transceiver is a high-performance module for short-distance duplex data communication and interconnection applications. It integrates a single LC duplex fiber optic cable, and four electrical data channels in each direction can transmit data. Each electrical channel has a rate of 10.3125Gbps and complies with the 40GE XLPP| interface standard.

The YXFiber 's YXF-QP-M85L-01D transceiver internally multiplexes the XLPP| 4x10G interface into two 20Gb/s electrical channels, and uses bidirectional optical fibers for optical transmission and reception over one simplex LC fiber. This brings the total bandwidth of the duplex LC optical cable to 40Gbps. This enables the installed LC duplex cabling infrastructure to be reused for 40GbE applications.

The link distance can reach 100 meters when using OM3 fiber and 150 meters when using OM4 fiber. These modules are designed to operate on multimode fiber systems, using a nominal wavelength of 850nm on one end and 900nm on the other end. The electrical interface uses a 38-core SFP+ type edge connector. The optical interface uses a traditional LC duplex connector. The module uses Technologies' mature integrated circuit and VCSEL technology to provide reliable long life, high performance and stable service.

Features

Meets IEEE 802.3ba-2010 40GbE XLPPl electrical specifications

Meets QSFP+ SFF-8436 specifications

Power Class 4: 3.5W maximum power

1M eye-safe

High port density: 21mm horizontal port spacing, 10.3125 Gbps per electrical channel, supports 64b/66b encoded data

Link lengths up to 100m with OM3 fiber and 150m with OM4 fiber

Case temperature operating range: +10 to +70°C

Proven high-reliability technology: VCSEL transmitter and PlN receiver

Hot-swappable transceivers for easy installation and maintenance

Two-wire serial (TWS) management interface with maskable breakout for scalable functionality

Uses standard LC duplex fiber cable to reuse existing cable infrastructure

Applications

40 Gb Ethernet interconnects; Datacom switch and router connections; Data aggregation and backplane applications; Proprietary protocols and density applications.