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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.
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Item |
Description |
|
Model Number |
BLPD-P |
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Brand Name |
Belycomm |
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Mounting Type |
Plug in |
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Description |
InGaAs 1310nm pin diode |
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Type |
PHOTODIODE |
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Place of Origin |
Fujian, China |
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Package Type |
Through Hole |
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Package / Case |
Coaxial |
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Operating Temperature |
-20 to +70 |
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Application |
CATV |
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Supplier Type |
Original manufacturer, ODM, agency, retailer |
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Media Available |
Datasheet, Photo |
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Max. Forward Voltage |
0.8V |
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Max. Reverse Voltage |
15V |
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Max. Forward Current |
20mA |
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Max. Reverse Current |
0.5mA |
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Product name |
InGaAs 1310nm photodiode |
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Brand |
Belycomm |
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Active area |
75um |
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Fiber type |
SM G625 |
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Wavelength |
1100–1700nm |
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Power |
10mW |
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Current |
10mA |
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Application |
CATV |
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Application 2 |
Optical receiver |
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Lead Time |
7 days |
High Sensitivity
APDs can detect very weak light signals thanks to their internal gain process, making them ideal for low-light or long-distance detection tasks.
Fast Response Time
With their strong electric field and rapid multiplication of carriers, APDs respond faster than standard photodiodes, which is useful in high-speed optical systems.
Internal Gain (Avalanche Effect)
APDs can amplify the signal inside the device itself, reducing the need for external amplification and improving the overall signal quality.
Better Signal Quality
The multiplication effect helps produce a stronger, clearer signal from even a small amount of incoming light.
Suitable for Long-Distance Optical Communication
Their high sensitivity and speed make them a great choice for receiving weak signals in fiber optic communication systems.
Broad Wavelength Detection
APDs can detect light across a wide range of wavelengths, which makes them useful in various sensing and imaging applications.
Compact and Durable
Being solid-state devices, APDs are small in size and reliable in performance, suitable for compact and long-lasting systems.
Material of APD
Silicon Avalanche Photodiode (Si APD)
The APDs built using Si (Silicon) material are most common. They cover the wavelengths of light in the visible to near-infrared (IR) region (up to 1100 nm), and without any excessive noise in gain. The Si-APDs are particularly useful in LiDAR, optical communication, and medical imaging.
InGaAs Avalanche Photodiode
The InGaAs (Indium Gallium Arsenide) is another material widely used to make avalanche photodiodes. The APDs built using InGaAs can cover the wavelength range between 900–1700 nm. They are better suited for optical fiber systems and telecommunications. These APDs, however, require heterostructure design to manage noise.
Absorption Region
This is where incident photons are absorbed, and primary electron-hole pairs are generated.
Multiplication Region
Located adjacent to the absorption region, this is where the avalanche effect predominantly takes place, amplifying the initial photocurrent.
P-N Junction
Like other diodes, an APD has a p-n junction, which, when reverse-biased, allows for the flow of photocurrent.
Anti-Reflective Coating
To enhance the efficiency of photon capture, many APDs have an anti-reflective coating, ensuring that more photons enter the device rather than being reflected off.
|
Parameter |
Symbol |
Min. |
Typ. |
Max. |
Unit |
Notes |
|
Reverse Breakdown Voltage |
VBR |
40 |
45 |
55 |
V |
ID = 100 μA |
|
Temperature Coefficient of Reverse Breakdown Voltage1 |
δ |
0.2 |
%/°C |
|||
|
Dark Current |
ID |
5 |
25 |
NA |
VR = VBR*0.9 |
|
|
Multiplied Dark Current |
IDM |
1 |
3 |
NA |
M = 2 to 10 |
|
|
Terminal Capacitance |
Ct |
0.35 |
PF |
VR = VBR* 0.9, f = 1 MHz |
||
|
Cut-off Frequency |
FC |
2.5 |
GHz |
M = 10 |
||
|
Quantum Efficiency |
η |
76 |
90 |
% |
λ = 1310 nm, M = 1 |
|
|
65 |
77 |
λ = 1550 nm, M = 1 |
||||
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Responsivity |
S |
0.85 |
0.90 |
A/W |
λ = 1310 nm, M = 1 |
|
|
0.90 |
0.95 |
λ = 1550 nm, M = 1 |
||||
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Excess Noise Factor |
X |
0.7 |
- |
λ = 1310 nm, IPO = 1.0 μw, M = 10, f = 35 MHz, B = 1 MHz |
||
|
F |
5 |
λ = 1550 nm, IPO = 1.0 μw, M = 10, f = 35 MHz, B = 1 MHz |
||||
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Optical Return Loss |
ORL |
30 |
40 |
DB |
SMF |
Basic Principles of APD
Photon Absorption and Electron-Hole Pair Generation
Everything starts with light. When photons — the smallest units of light — strike the APD, they interact with the semiconductor material. This interaction results in the generation of electron-hole pairs. Simply put, for each photon absorbed with energy greater than the semiconductor's bandgap, an electron is excited to the conduction band, leaving behind a hole in the valence band. These electron-hole pairs are primed to carry electric current.
Multiplication Process
Primary and Secondary Ionizations: Once generated, these electron-hole pairs are exposed to the device's internal electric field, created by the reverse-bias voltage. As they gain momentum within this field, they might collide with other semiconductor atoms, causing the generation of additional electron-hole pairs — a process called impact ionization. The original carriers are primary carriers, and the ones generated due to impact ionization are secondary carriers. This chain reaction is the so-called “avalanche” process, leading to a multiplication of the initial current.
Gain Factor and How It's Controlled
The gain factor represents the multiplication achieved within the APD. For instance, a gain factor of 100 means that each primary electron-hole pair results in 100 times the current due to the avalanche process. The gain is primarily controlled by the applied reverse-bias voltage: the higher the voltage, the greater the multiplication. However, it's crucial to manage this gain since higher multiplication also results in increased noise in the output signal.
Optical Communications (e.g., Fiber Optic Networks): In the world of fiber optics, where data is transmitted as pulses of light across long distances, the detection of these faint light signals becomes crucial. APDs, with their amplification capabilities, often act as receivers in fiber optic communication systems. Their high sensitivity ensures that even weak signals, attenuated after traveling long distances, are accurately detected and converted into electrical data.
LIDAR and Distance Measurement: LIDAR (Light Detection and Ranging) is a remote sensing method that uses light in the form of a pulsed laser to measure distances. APDs are used as detectors in LIDAR systems due to their fast response times and ability to detect weak return signals, making them ideal for applications ranging from autonomous vehicle navigation to topographical mapping.
Medical Imaging: In the realm of medical diagnostics, accuracy is paramount. APDs are employed in certain medical imaging techniques, like Positron Emission Tomography (PET). Their high sensitivity and speed enable the detection of weak gamma rays emitted during the procedure, providing detailed images that assist in disease diagnosis and treatment planning.
Low-light Detection and Night Vision: Operating in low-light conditions demands sensors that can amplify available light without introducing excessive noise. APDs, with their inherent amplification ability, find applications in night vision equipment and other scenarios where light levels are minimal but clarity is essential.
High-speed Data Transmission: Beyond fiber optics, APDs find applications in other high-speed data transmission applications. Their rapid response times and high bandwidths ensure that data is transmitted and received without significant latency, paving the way for real-time communication in critical systems.
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Quantity (pieces) |
1 - 100 |
101 - 1000 |
1001 - 10000 |
> 10000 |
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Lead time (days) |
5 |
6 |
10 |
To be negotiated |
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Selling Units |
Single item |
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Single Package Size |
30X24X5 cm |
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Single Gross Weight |
0.005 KG |
As one of the most professional apd manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to buy customized apd from our factory.
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