TOPTICA’s TopMode lasers combine the ease of use of a HeNe with significantly higher output power as a 405nm Laser. As a true Single Frequency Laser with extremely Narrow Linewidth, the TopMode sets benchmarks in power, coherence and wavelength stability.
At the core of this High Coherence Laser is the proprietary CHARM Coherence Control technology, which ensures stable, continuous single-frequency operation. The combination of TopMode and CHARM stands for reliable 24/7 performance in demanding environments.
The TopMode is ideally suited for applications requiring a powerful and stable beam, such as Raman Spectroscopy, Holography Laser systems, interferometry and holographic data storage. Its high power and wavelength stability in the visible range make it fully compatible with silicon detectors, simplifying integration and improving usability for engineers and scientists alike.
Our TopMode lasers are designed to be as intuitive as a HeNe, while delivering superior performance as a 405nm Laser. As a compact Single Frequency Laser with Narrow Linewidth and outstanding stability, they are ideal for both laboratory use and OEM integration, including as an OEM Laser Module 405nm.
Powered by CHARM Coherence Control, our proprietary regulation technology ensures continuous single-frequency operation with excellent long-term stability. This High Coherence Laser delivers consistent results and dependable 24/7 operation.
TopMode lasers are perfectly suited for precision applications such as Raman Spectroscopy, Holography Laser setups, interferometry and Direct Writing Lithography. With high output power and exceptional wavelength stability in the visible spectrum, they integrate seamlessly with silicon-based detection systems and existing platforms.
A versatile solution that supports both advanced research and robust industrial system performance.
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Your Benefits
High power in a small package
100 mW of power and a long coherence length. The TopMode is the only single-frequency laser on the market in this form factor providing up to 100 mW of power at 405 nm.
Repeatable high-resolution measurements
Our low-noise CHARM controller, together with our grating-stabilised diode laser, provides active coherence control. The external cavity architecture provides a long coherence length and our CHARM coherence control system monitors the laser and actively maintains single-frequency operation.
Run your measurement with high uptimes
Our lasers keep running in single frequency for a long time. Compact and passively air-cooled, the TopMode laser head is absolutely silent and free of vibrations.
Develop your products faster
The TopMode is designed with OEM integration in mind. The laser head is compact and passively cooled, enabling easy integration into your optical system.
Easy laser control with the Python Laser SDK
Our TOPTICA Python Laser SDK (Software Development Kit) makes straightforward the control of TOPTICA lasers from a computer using the Python programming language.
Applications
Raman spectroscopy
Well-suited for Raman spectroscopy of inorganic materials, for which no fluorescence obscures the Raman signal. Raman intensity depends on the excitation wavelength by a factor 1/λ4. Our lasers for this application allow for a strong Raman signal that remains detectable by Si-based detectors.
Direct writing lithography
Direct writing lithography is applied across multiple fields that require precise patterning at micron or nanometer scales, particularly where flexibility or customization is important.
Semicon inspection & metrology
Laser-based metrology and inspection have become indispensable tools for shrinking feature sizes, more and thinner layers, as well as increasing chip and package areas.
Interferometry
In semiconductor manufacturing, perfection is measured in nanometers - or often even less. To measure such minute variations with speed and accuracy, the industry relies on laser-based interferometric metrology - a non-contact, non-destructive optical technique capable of resolving surface and layer thickness with sub-nanometer precision.
Holography & augmented reality
Holography has evolved from an artistic curiosity into a cornerstone technology for next-generation optical systems. From augmented reality (AR) displays and automotive lighting to precision metrology, data storage, and optical security, holography today enables engineers and designers to shape, direct, and control light with unprecedented precision.
Options
Higher power
If you need more power for your application, please refer to our HP product variants with up to 100 mW of optical power output at 405 nm. See specifications for details.
Fiber delivery
The FD2 option comes with TOPTICA’s patented SmartDock fiber coupler with a coupling efficiency of more than 50 % and a 2 m polarisation-maintaining fiber. See products marked with FD2 in the specifications.
Higher optical isolation
An optional second optical isolator provides enhanced protection against optical feedback into the laser. This ensures stability of the output power, as well as wavelength stability and coherence.
Tighter wavelength specification
The nominal emission wavelength will be specified to ± 0.25 nm instead of the standard ± 2 nm.
Custom design
A large variety of wavelengths between 375 nm and 515 nm is available with the TopMode CD variant. Please inquire availability of your desired wavelength.
Specifications
After tens of thousands of hours testing, we’re proud to be releasing the newest version of the TopMode, delivering the stable performance our customers can depend on.
Stefan Brakhane
R&D Team Lead for TopMode at TOPTICA
