Vexlum
High-power & single-frequency VECSELs at 350–2150 nm for quantum technology
Vexlum LtdKauhakorvenkatu 53 B
33710 Tampere
Finland
Tel.: | +358 40 778 1251 |
E-mail: | |
Website: | ![]() |
Social media: |
Company Description
Vexlum is a spin-off from the Optoelectronics Research Centre (ORC), Tampere University of Technology.
The team has been a leading research group in the area of VECSEL technology for more than a decade. In particular, we have focused on developments concerning optoelectronics materials enabling VECSELs at new wavelengths, scalable manufacturing processes, and application specific systems engineering.
Recent breakthroughs include the use of VECSELs for quantum technology applications.
We capitalize on a comprehensive knowledge in epitaxy, optoelectronics processes, and laser systems. The technical expertise is complemented by proven entrepreneurial skills.
Our vision is to bring VECSEL technology to high impact applications where we can deliver unique benefits in performance, cost, and usability.

Distributors
Vexlum has the following distributor:
- Opton Laser International: France.
Exhibitions
See us at LASER World of Photonics 2025 in Munich, June 24–27 (booth B2.441)!
News
Excellent frequency noise characteristics measured from Vexlum VALO product!

Star product: VALO is a tunable single-frequency VECSEL platform that combines a unique set of laser properties in a compact package. VALO covers wavelength range 350–2150 nm, combines high-power output, and narrow-linewidth frequency spectrum with an excellent spatial quality.. More information on star product
Products
Product Category | Description |
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blue lasers | ![]() VEXLUM offers VECSEL technology with intracavity frequency doubling, producing diffraction-limited, watt-level lasers across the blue spectral region (400–500 nm). The lasers feature a wavelength tuning range of ±1 nm and a narrow linewidth, ideal for various applications: Quantum technology:
Semiconductor applications:
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diode-pumped lasers | ![]() Vertical-External-Cavity Surface-Emitting Lasers (VECSELs), also known as semiconductor disk lasers or optically pumped semiconductor lasers, provide a versatile platform with features beneficial for applications requiring broad wavelength coverage and high output power. Key features include:
VECSELs are suitable for applications that demand exotic wavelengths and high power with narrow spectral linewidths. |
frequency-stabilized lasers | ![]() VEXLUM provides lasers that can be frequency-stabilized using external reference signals such as wavemeters or reference cavities. VALO and VXL lasers feature:
These capabilities allow for highly precise optical frequencies, making them ideal for quantum technology and spectroscopy applications. The fast lock option is particularly useful for demanding clock transitions. |
green lasers | ![]() VEXLUM offers VECSEL technology with intracavity frequency doubling, producing diffraction-limited, watt-level lasers across the green spectral region (500–570 nm). The lasers feature a wavelength tuning range of ±1 nm and a narrow linewidth, ideal for various applications: Quantum technology:
Medical applications:
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laser guide stars | ![]() VEXLUM offers VECSEL technology as a cost-effective alternative to traditional diode and fiber amplifier setups for sodium guide star lasers. For more information or to start a discussion, contact the VEXLUM team. |
lasers | ![]() VEXLUM offers watt-level single-frequency lasers based on VECSEL technology with broad wavelength coverage. Our product lines include:
Wavelengths range from 350 nm to 2150 nm, and power levels up to 10 W. |
narrow-linewidth lasers | ![]() VEXLUM lasers are designed for narrow-linewidth operation, utilizing an external cavity configuration with frequency-selecting elements such as a birefringent filter and etalon. These lasers offer:
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red lasers | ![]() VEXLUM offers VECSEL technology with intracavity frequency doubling, producing diffraction-limited, watt-level lasers across the red spectral region (625–750 nm). The lasers feature a wavelength tuning range of ±1 nm and a narrow linewidth, ideal for various applications: Quantum technology:
Semiconductor applications:
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scientific lasers | ![]() VEXLUM offers watt-level single-frequency lasers based on VECSEL technology with broad wavelength coverage. Wavelengths range from 350 nm to 2150 nm, and power levels up to 10 W. We will configure the laser exactly to your wavelength. Challenge us with specs of your dream laser! |
semiconductor lasers | ![]() VEXLUM has Vertical-External-Cavity Surface-Emitting Lasers (VECSELs), also known as semiconductor disk lasers or optically pumped semiconductor lasers. These are a versatile platform with features beneficial for applications requiring broad wavelength coverage and high output power. Key features include:
VECSELs are suitable for applications that demand exotic wavelengths and high power with narrow spectral linewidths. |
single-frequency lasers | ![]() VEXLUM lasers are designed for narrow-linewidth operation, featuring an external cavity configuration with frequency-selecting elements such as a birefringent filter and etalon/EOM. Key specifications include:
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surface-emitting semiconductor lasers | ![]() VEXLUM's products are based on VECSEL technology. The surface emission aspect provides ecellent spatial quality with M2 < 1.1. |
thin-disk lasers | ![]() Vertical-External-Cavity Surface-Emitting Lasers (VECSELs), also known as semiconductor disk lasers or optically pumped semiconductor lasers, are a versatile laser technology platform. They combine the wavelength versatility of semiconductor gain structures with the heat management capabilities and external cavity architecture of the thin-disk concept. This integration provides:
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tunable lasers | ![]() VEXLUM's products utilize VECSEL technology for tunable narrow-linewidth operation. Typical tuning ranges are ±1 nm, extending up to 100 nm at IR wavelengths. For more information, please contact us. |
ultraviolet lasers | ![]() VEXLUM offers products starting from the ultraviolet wavelength of 350 nm, suitable for applications in semiconductor technology, quantum technology, and more. For specific requirements, please contact VEXLUM directly. |
vertical external-cavity surface-emitting lasers | ![]() Vertical-External-Cavity Surface-Emitting Lasers (VECSELs), also known as semiconductor disk lasers or optically pumped semiconductor lasers, provide a versatile platform with features beneficial for applications requiring broad wavelength coverage and high output power. Key features include:
VECSELs are suitable for applications that demand exotic wavelengths and high power with narrow spectral linewidths. |
yellow and orange lasers | ![]() VEXLUM offers VECSEL technology with intracavity frequency doubling, producing diffraction-limited, watt-level lasers across the yellow-orange spectral region (565–625 nm), which is very challenging for competing technologies. The lasers feature a wavelength tuning range of ±1 nm and a narrow linewidth, ideal for various applications: Quantum technology:
Others:
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