Professional Certifications
We have obtained ISO 9001 quality management system and ISO 14001 environmental management system certifications and are actively pursuing IATF 16949 International Automotive Task Force quality management system certification, laying a solid foundation for the application of LiDAR products in the automotive field.
Customized Services
We can provide customized production services for optical fiber products according to customer needs. We implement strict quality control at every stage of the manufacturing process to ensure stable and reliable product performance.
Production Equipment
We have established advanced chip packaging production lines and automatic coupling production lines. Key equipment includes: eutectic die bonding machines, fully automatic eutectic machines, parallel sealing welding machines, TO automatic sealing machines, OSA automatic transmitter coupling machines, and OSA automatic receiver coupling machines.
Professional Team
We maintain close collaborations with renowned research institutions and universities such as the Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Xiamen University, Shenzhen University, Fuzhou University, and Mingde Innovation Laboratory, bringing together a group of experts and technical personnel with long-term experience in optical device research and development.
|
Field |
Content |
|
Model Number |
BLT-133-4B2(R) |
|
Brand Name |
Belycomm |
|
Mounting Type |
Universal Type |
|
Description |
Plug In Laser Module |
|
Type |
Laser Diode |
|
Place Of Origin |
Fujian, China |
|
Package Type |
Through Hole |
|
Package / Case |
Coaxial |
|
Operating Temperature |
-40~+85℃ |
|
Application |
Optical Bidi Module And Optical Transceivers |
|
Supplier Type |
Original Manufacturer, ODM, Agency, Retailer |
|
Media Available |
Datasheet, Photo |
High-Speed Data Transfer
TOSAs support high-speed data transmission, allowing for faster internet services and improved communication systems.
01
Low Signal Loss
The efficient design of TOSAs minimizes signal loss during transmission, ensuring data integrity over long distances.
02
Compact Size
The compact nature of TOSAs allows for easy integration into different systems and devices.
03
Cost-Effective Solutions
TOSAs provide a cost-effective way to enhance data transmission capabilities without the need for extensive infrastructure changes.
04
Scalability
As data demands increase, TOSA technology can easily scale to accommodate higher bandwidth requirements.
05

TOSA is the main component of the optical transmitter module, which mainly completes the conversion of electrical signals into optical signals. TOSA can be divided into SC TOSA, LC TOSA, FC TOSA and ST TOSA according to adapter types. TOSA includes optical isolators, monitoring photodiodes, LD drive circuits, thermistors, thermoelectric coolers, automatic temperature control circuits (ATC), and automatic Power control circuits (APT). Among them, the light source (semiconductor light-emitting diode or laser diode) is the core, the LD chip, monitoring photodiode and other components are packaged in a compact structure (TO coaxial package or butterfly package), which then constitutes TOSA.
Depending on the application, S designs vary:
| Laser Types: | VCSEL (for short distances), DFB (medium distances), and EML (long-haul networks). |
| Modulation Techniques: | Direct modulation (DML) for cost-effective solutions vs. electro-absorption modulation (EML) for high-speed, low-distortion performance. |
Laser Source
Commonly DFB lasers for single-mode fiber or VCSELs for multimode fiber.
Provides continuous-wave (CW) or directly modulated light.
Monitor Photodiode
Monitors laser output power to enable feedback control.
Maintains consistent optical power and wavelength stability.
Optical Coupling
Focuses the laser output into a fiber via lenses, ferrules, or waveguides.
Minimizes insertion loss and optimizes alignment with fiber.
Signal Flow
Electrical signal → Laser modulation → Optical signal → Fiber interface → Network transmission
|
Component |
Functionality Description |
|
TOSA |
Transmits optical signals into the fiber optic cable. |
|
ROSA |
Receives optical signals from the fiber optic cable and converts them back to electrical signals. |
|
BOSA |
Combines TOSA and ROSA functionalities with a WDM filter to enable bi-directional communication on a single fiber strand. |
☆Data Centers: Short-reach connections with high-speed VCSEL TOSAs.
☆Enterprise Networks: 10–100 km links with DFB-based TOSAs.
☆Metro and Long-Haul DWDM Systems: High-power, wavelength-stabilized TOSAs for multi-channel transmission.
☆High-Performance Computing (HPC): Low-latency optical interconnects in AI clusters.
☆Optical Test Equipment: High-precision light sources for laboratory measurements.

|
Quantity (pieces) |
1 - 100 |
101 - 1000 |
1001 - 10000 |
> 10000 |
|
Lead time (days) |
10 |
16 |
18 |
To be negotiated |
|
Packaging |
Wooden box, PE film |
|
Transportation methods |
Road transport, rail transport, sea transport, air transport |


As one of the most professional tosa manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to buy customized tosa from our factory.
tosa, TOSA Laser