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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Model Number |
BLLD-PSA2-D5520H-2GR(TEC) |
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Mounting Type |
Universal type |
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Description |
DFB Laser Coaxial Laser Module |
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Type |
Laser Diode |
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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~+70℃ |
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Application |
Optical Bidi Module and Optical Transceivers |
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Supplier Type |
Original manufacturer, ODM, agency, retailer |
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Media Available |
Datasheet, Photo |
Efficiency
Laser diodes are generally energy-efficient, converting a significant portion of electrical input power into optical output power.
Stability
Laser diodes have low power and wavelength fluctuations over time and good output stability.
Versatility
Laser diodes track down applications in diverse fields, including broadcast communications, clinical gadgets, standardized identification scanners, laser pointers, cutting and etching frameworks.
Low Divergence
Laser diodes are useful for applications that require precise targeting or focusing due to their low divergence and relatively narrow beam.
Double Heterostructure Laser Diode
The word ‘Hetero’ means ‘different’. Such laser diode has its middle intrinsic layer made of different materials and sandwiched between the P-type and N-type layer of the same material. Therefore it forms two junctions (Heterojunctions) on both sides, thus the name double heterostructure laser.
Quantum Well Laser Diode
In a quantum well laser diode, the intrinsic layer or active region is so narrow as to give rise to quantum confinement. Since the wavelength of emitted radiations depends on the width of the active region, its thinner active region generates a shorter wavelength than a conventional laser diode.


Separate Confinement Heterostructure Laser Diode
A Quantum well laser diode cannot properly confine emitted photons. Therefore in the heterostructure laser diode, extra layers having lower refractive index are added to confine the light more effectively. Both layers surrounding the active region act as a waveguide. Due to multiple photon striking, high optical gain is achieved.
Vertical Cavity Surface Emitting Laser Diode
Such laser diode has its optical cavity designed along the axis of the current flow. Other laser diodes have their optical cavity placed perpendicular to the flow of current. The laser beam is emitted from the top surface instead of emitting it from the edge as in an edge-emitting laser.
The specific construction of laser diodes is key to their principle of operation. At the centre of laser diodes is a p-n junction which is a space between a layer of n-type and another layer of p-type semiconductor material. The presence of this means electrical current can only flow in one direction (meaning it's forward-biased).
Typically these materials are gallium arsenide doped with aluminium, silicon, selenium or indium. The p-type layer has more negatively charged particles while the n-type section is filled with electrons.
At the end of these layers are reflective surfaces, with one being completely reflective and the other partially so.
This means when an electrical current is supplied to the laser diode, the following process occurs:
● Free electrons move from the n-type layer to the p-type layer.
● Some of these electrons will combine with the negatively charged particles and stimulates them.
● This stimulation causes their energy levels to increase and photons (light energy) to be released.
● These photons in turn combine with more electrons, causing greater stimulation and further photons to be produced.
● This light energy bounces between the two reflective layers, causing a strong beam of light to be released from the laser diode.
Optical Communications
Laser diodes power optical communication systems, transmitting data through fibers over long distances with high precision.
Material Processing
In industrial settings, laser diodes enable precise cutting, welding, and surface treatments for metals and plastics.
Optical Storage
They play a vital role in data storage devices like CDs, DVDs, and Blu-ray discs for reading and writing data.
Medical Technology
Laser diodes support surgeries, diagnostics, and therapies by delivering precise and controlled light energy.
Advanced Displays
They are key components in RGB projectors and next-generation display technologies for bright, focused light beams.
Spectroscopy and Metrology
Laser diodes are indispensable for material analysis and measuring physical properties with high accuracy.
Barcode Scanning and Sensing
Their coherent light ensures precise performance in barcode scanners and a variety of sensor applications.
Laser Pump Sources
Laser diodes enhance the efficiency of solid-state lasers when used as pump sources.
Telecommunications Networks
In Dense Wave Division Multiplexing (DWDM) systems, they boost data capacity in modern networks.
Scientific Exploration
Laser diodes are essential tools in research fields like microscopy, holography, and spectroscopy for their precision.
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Selling Units |
Single item |
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Single package size |
29X22.5X5.5 cm |
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Single gross weight |
1.000 KG |
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Quantity (pieces) |
1 - 100 |
101 - 1000 |
1001 - 10000 |
> 10000 |
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Lead time (days) |
14 |
20 |
30 |
To be negotiated |


As one of the most professional other laser diode manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to buy customized other laser diode from our factory.
2 5G 1270 1610nm DFB LD Laser, 2 5G 1550nm DWDM DFB LD Laser, other laser diode