The Lumentum 25G T-SFP28 is a high-performance tunable transceiver technology at 25G for 5G wireless fronthaul systems. Its features include:
– Full C-band coverage, 100 GHz channel spacing
– Dual rate 25 Gbps and 10 Gbps; Reach: 15 km (25G), 20 km (10G)
– Duplex
 TOSA: Monolithic tunable laser + InP MZ modulator (ILMZ)
– Supports full I-temp -40°C to 85°C operation
– Smart Tunable MSA and O-RAN Alliance compliant

https://www.lumentum.com/en/products/tunable-sfp-25g-dwdm-serial-optical-transceiver