TOSA

Your Professional TOSA Supplier

 

 

Xiamen Bely Information Technology Co., Ltd., established in 2004, is a high-tech enterprise specializing in the research and development, production, and sales of a variety of optical active components, passive components, and networking equipment in the field of fiber optic communications.The products are widely used in: Broadcasting and television, Mobile and satellite communications, Broadband and data centers, Security monitoring, Instrumentation, Autonomous driving, Medical, other industries.

 

 
 
Why Choose Us
 

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.

 

Specification

 

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

 

Advantages of TOSA

 

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 Laser

 

The Role Of TOSA

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.

 

Types of 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.

 

Basic Principles of TOSA
1

Laser Source

Commonly DFB lasers for single-mode fiber or VCSELs for multimode fiber.
Provides continuous-wave (CW) or directly modulated light.

2

Monitor Photodiode

Monitors laser output power to enable feedback control.
Maintains consistent optical power and wavelength stability.

3

Optical Coupling

Focuses the laser output into a fiber via lenses, ferrules, or waveguides.
Minimizes insertion loss and optimizes alignment with fiber.

4

Signal Flow

Electrical signal → Laser modulation → Optical signal → Fiber interface → Network transmission

 

Differences Between TOSA, ROSA, and BOSA

 

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.

 

 

TOSA Typical Use Cases

☆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.

TOSA Laser

 

Lead Time

 

Quantity (pieces)

1 - 100

101 - 1000

1001 - 10000

> 10000

Lead time (days)

10

16

18

To be negotiated

 

Packaging and Shipping

 

Packaging

Wooden box, PE film

Transportation methods

Road transport, rail transport, sea transport, air transport

 

Video

 

 

Our Certificate

 

productcate-800-1132
productcate-800-1132

 

FAQ

 

Q: What are the main components of a TOSA?

A: A typical TOSA includes a laser diode (such as DFB, FP, or VCSEL), a monitor photodiode, optical coupling elements, and a precision housing to ensure stable optical alignment.

Q: What applications commonly use TOSA modules?

A: TOSAs are widely used in optical transceivers, PON equipment, data center interconnects, CATV systems, and various fiber optic communication modules.

Q: What wavelengths are available for TOSAs?

A: Common operating wavelengths include 850 nm, 1310 nm, 1490 nm, 1550 nm, and 1577 nm, depending on the transmission distance and system requirements.

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.

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