1.25G SC BiDi SFP Module 1310nm/1550nm WDM switch Compatible SFP Transceiver module with Switch with DDM Function - AliExpress
Commercial SFP Transceivers: LPS SM BIDI 2613R SC, 1.25Gb Single Mode Bi-directional SFP Transceiver with SC Connector, Single Fiber for up to 20KM, with DDM
1.25Gb/s SC SFP Module Optical Transceiver CWDM or DWDM 1550-1310nm Single-mode BIDI - Bithoo Communication
ONS-SC-Z3-1590-LW - OC48C/STM-16/GE CWDM SFP Transceiver, SM 1590nm, LC