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Beam Combiner Suppliers - Customized Solutions from China Factory for Multi-Wavelength Optical Path Applications
🔎Product Overview
A beam combiner is a semi-transmissive mirror that combines two (or more) wavelengths of light into a single optical path through transmission and reflection, respectively. The beam combiner usually transmits infrared light and reflects visible light (beam combiners are used when the infrared CO2 high-power laser uses a helium-neon visible diode laser to straighten the light path).
📋Product Specifications
- ▶ Short-wave pass beam combiner (45°): T>97% @ 960–980nm / R>97% @ 1020–1040nm
- ▶ Long-pass beam combiner (45°): R>95% @ 1041nm / T>95% @ 1065nm
🎯Application Areas
⚙Production Process
❓ Frequently Asked Questions
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What is a beam combiner and how does it work?
A beam combiner is a semi-transmissive optical mirror that merges two or more wavelengths of light into a single optical path. It works by transmitting certain wavelengths (e.g., infrared) while reflecting others (e.g., visible light), enabling efficient multi-wavelength beam alignment.
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What is the difference between a short-wave pass and a long-pass beam combiner?
A short-wave pass beam combiner transmits shorter wavelengths and reflects longer ones, while a long-pass beam combiner does the opposite — reflecting shorter wavelengths and transmitting longer ones. Both are optimized at a 45-degree angle of incidence for specific wavelength ranges.
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What are the typical application areas for beam combiners?
Beam combiners are widely used in laser cutting, laser welding, laser cladding, and laser medical treatment. They are essential components in systems where multiple laser wavelengths must be aligned along a common optical axis.
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Why are beam combiners used in CO2 laser systems?
In CO2 high-power laser systems, the infrared beam is invisible to the human eye. A helium-neon (HeNe) or visible diode laser is used as a guide beam for alignment purposes. The beam combiner merges these two beams into a single path, allowing operators to align the invisible infrared laser using the visible guide beam.
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What transmission and reflection performance can be expected from these beam combiners?
The short-wave pass beam combiner achieves T>97% at 960–980nm and R>97% at 1020–1040nm. The long-pass beam combiner provides R>95% at 1041nm and T>95% at 1065nm, ensuring high efficiency and minimal optical loss in demanding laser applications.
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At what angle of incidence are these beam combiners designed to operate?
Both the short-wave pass and long-pass beam combiners are designed to operate at a 45-degree angle of incidence, which is the standard configuration for most beam combining and splitting optical setups in laser systems.



