Amazon.com: A Pair of 10G SFP+ Bidi Transceiver, LC Single-Mode Single Fiber Module, 10GBASE-BIDI 1270nm/1330nm for Cisco SFP-10G-BX20D-I/SFP-10G-BX20U-I, Ubiquiti UniFi, Mikrotik, and More, DOM, up to 20 km : Electronics
40G QSFP+ Bidi (Bidirectional) Transceiver - Optech Blog
Customized BIDI Transceivers SFP Fiber 1.25Gbs SC 40km Manufacturers, Suppliers - China Factory Direct Price - HTF
BiDi Transceiver vs Standard Fiber Optic Transceiver
Amazon.com: A Pair of 1.25G SFP+ Bidi Transceiver, LC Single-Mode Single Fiber 1000Base-BIDI Module for Cisco 1000BASE-BX3-U/1000BASE-BX3-D, Ubiquiti UniFi UF-SM-1G-S and More, SMF 1550nm/1310nm, DDM, up to 2km : Industrial & Scientific