An SFP+ module with a 1.25G Class 1 laser is a type of small form-factor pluggable transceiver used in fiber optic communications. Here’s a breakdown of the specifications:

– SFP+: Indicates the module’s form factor and compatibility with SFP+ ports
– 1.25G: Refers to the module’s data transfer rate of 1.25 Gigabits per second
– Class 1: Denotes the laser’s safety classification, indicating it is eye-safe and emits minimal radiation
– Laser: Specifies the module’s use of a laser as the light source for data transmission

These modules are commonly used in:

– Data centers
– High-speed networking equipment
– Fiber optic communication systems

They support distances of up to 10 kilometers (6.2 miles) over single-mode fiber optic cables, making them suitable for various applications, including:

– 10GbE (10 Gigabit Ethernet)
– Fibre Channel
– InfiniBand

When selecting an SFP+ module, ensure compatibility with your specific network equipment and fiber optic infrastructure to guarantee reliable performance.