TopMode

Single-frequency, narrow linewidth diode laser

The "blue HeNe laser" for your metrology applications

TopMode

Single-frequency, narrow linewidth diode laser

TOPTICA’s TopMode lasers operate as easily as a HeNe, but also offer higher power at 405 nm. The TopMode sets records in terms of power, coherence and wavelength stability. The proprietary regulation method, called CHARM, ensures continuous single-frequency operation. TopMode and CHARM means nothing less than reliable 24/7 operation.

The TopMode is particularly well-suited to applications that require a strong single-frequency, high-coherence beam. Raman spectroscopy of inorganic materials, holography, interferometry and holographic data storage all benefit from the TopMode's characteristics: High power and wavelength stability at a wavelength that is visible to the naked eye, compatible with silicon detectors, making the live of engineers and scientists much easiers.

Your Benefits

High power in a small package

100mW 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

The grating-stabilised diode laser is perfected by our CHARM 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. The laser can be easily controlled programmatically using ASCII commands, from your own program.

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.

Maskless lithography & laser direct writing

In modern microlithographic systems compact violet and UV diode lasers have taken the place of bulky gas lasers or HeCd lasers. The superior performance of diode lasers enable improved up-times, lower cost of ownership and qualities of written features, which haven’t been imagined before this paradigm shift.

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

Light-field recording with phase information, for recording of patterns and pseudo-3D images. Coherent diode lasers at 407 nm, 457 nm, 514 nm, 647 nm or other wavelengths in the RGB region, and even in the UV region with power levels of several 100 mW have become the optimal choice for holography – especially in industrial applications. Whereas the original sources were bulky and operated at a fixed wavelength, diode lasers are tunable, so they perfectly match the user requirements.

Options

Fiber coupling: SmartDock

The SmartDock provides a coupling efficiency >50%. Both single-mode and polarization-maintaining fibers can be connected.

Wavelength selection

Request a wavelength selection of +/- 0.25 nm instead of the standard +/- 2 nm

Specifications

Talk to an expert Request a quotation Request a demo

Downloads

PDF

Technical Drawings

Technical drawings TopMode fiber coupler

Literature

Articles

Direct and frequency-converted diode lasers provide all wavelengths for holography

Ulrich Eismann, Direct and frequency-converted diode lasers provide all wavelengths for holography, Laser Focus World (2018)

TopMode

TopMode

Your Benefits

Applications

Options

Specifications

Related Products

Downloads

PDF

Product information TopMode

Application information TopMode for Raman spectroscopy

Application information TopMode for digital holography

Technical Drawings

Technical drawings TopMode fiber coupler

Literature

Articles

Direct and frequency-converted diode lasers provide all wavelengths for holography