This document introduces the LSA2825 and LSA3821 two optical module products technical parameters, including package form, laser chip type, working current, operating temperature range, optical power, pinout and mounting flange options.
The LSA2825 (analog coaxial laser) and LSA3821 (dual‑in‑line package) are compact laser transmitters operating around 1300 nm. They feature a strained multi‑quantum‑well (SMQW) laser chip, rear‑facet monitor photodiode, and a variety of pinout and mounting flange options for CATV, CCTV, LAN/WAN and other applications. Safety warnings note that the devices are Class IIb (3b) lasers and must not be operated with an unconnected fiber pigtail.
The handbook provides absolute maximum ratings, performance specifications, analog characteristics, fiber‑pigtail dimensions, reliability targets, pinout diagrams, and ordering information such as connector types (AP, AS, US, SF) and flange options. Detailed electrical and optical parameters enable designers to integrate the modules into custom optical systems.
| Rated Optical Power (CW) | 1.0 mW |
|---|---|
| Threshold Current (Ith) at 25 °C | 3.5 – 10 mA |
| Slope Efficiency | 30 – 80 pW/mA |
| Center Wavelength | 1286 – 1336 nm |
| Operating Temperature Range | -40 °C to +85 °C |
| Laser Forward Current (max) | 120 mA |
| Laser Reverse Voltage (max) | 2 V |
| Photodiode Reverse Voltage (max) | 20 V |
The LSA2825 can deliver up to 1.0 mW of continuous‑wave optical power.
Both modules are rated for operation from –40 °C to +85 °C.
It is classified as a Class IIb (3b) laser product.