iWave – Narrow Linewidth Diode Laser
- Narrow linewidth (< 0.08 nm)
- Superior power and wavelength stability
- Up to 50mW @ 405nm (10mW @ 375nm)
- Compact OEM package
- Full computer control
Various linewidth sensitive applications share the same requirements with respect to lasers: Best beam quality, high power, blue/violet wavelength and, on top of that, a narrow linewidth. The iWave comprises all these requirements, combining a unique approach based on TOPTICA's proprietary know-how in providing narrow linewidth diode lasers with the matured OEM diode laser platform of the iBeam/iPulse.
Technical Information
Technical Information
Main Specifications:
| Available wavelength | 375 nm, 405 nm, others on request |
|---|---|
| Spectral linewidth | < 150 GHz ( = 0.08 nm resp. 5 cm-1) |
| Coherence length (typ.) | 1 mm |
| ASE suppression | > 30 dB |
| Power (free-beam) | up to 50 mW (@ 405 nm) |
| Spatial mode | TEM00, M² < 1.2 |
| Beam diameter (typical @ 1/e²) | 1.7 mm |
| Beam shape, ellipticity | circular, < 10% |
| Divergence (typical) | < 0.6 mrad |
| Power stability (drift over 48h @ ∆ T ± 1°C) | < 0.5 % |
| Pointing stability | < 10 µrad/K |
| Polarization | > 100: 1, linear |
| RMS noise (1 Hz – 10 MHz) | <0.5 % |
| DC input requirements | 12 V / 2 A |
| Operating ambient temperature range | 15..40 °C |
| Dimensions (L x W x H) | 206 x 56 x 66 mm³ |
For complete spec table please refer to the iWave brochure.
iWave – enhanced linewidth compared to a free-running LD
iWave – excellent power stability during a 24h temperature cyle
Comparison of iPulse, iBeam, iWave, BlueMode
| Laser | iPulse / iBeam | iWave | BlueMode |
|---|---|---|---|
| Power | 120 mW | 50 mW | 50 mW |
| Wavelength | 405 nm | 405 nm | 405 nm |
| Linewidth | 500 pm / 900 GHz | 80 pm / 150 GHz | 0.003 pm / 0.005 GHz |
| Coherence length | 300 µm | 1 mm | 25 m |
| Diode operation | Free-running | Enhanced linewidth | Single-frequency |
Specifications are subject to change without further notice.
Options & Related Products
Options & Related Products
Options:
- Analog modulation
Access to analog power modulation with a frequency of up to 2 MHz (depending on modulation depth). The modulation depth can be set by the operator and calibrated to the input signal. Any modulation function is supported (e.g. sine, triangle, arbitrary).
- Wavelength selection
Whenever a process shows extreme spectral dependence, the iWave can be ordered with a tighter wavelength tolerance (e.g. 407 ± 1 nm). Thus you can be sure to get the ideal laser emission for your process.
- Wide-range AC/DC transformer
Provides the necessary 12 V DC, if no adequate supply is available in your application.
Related Products:
- iPulse
- iBeam
- dfBeam
- iBeam smart
- BlueMode
- XTRA
Technical Drawings
Applications
Applications
- Raman microscopy / spectroscopy
- Linewidth sensitive applications using acousto-optic
Based on TOPTICA's proprietary know-how, the iWave combines high power and narrow linewidth. Frequent applications in semiconductor industry will benefit from this product. For instance, thin Silicon layers can be examined by Raman microscopy with great spatial and spectral resolution. Beyond Raman, there are many linewidth sensitive optical setups which relied on the inherent narrow linewidth of gas lasers. Further key applications besides Raman spectroscopy, which benefit from narrow linewidth, are interferometry and holography. Whenever the standard coherence length of free running diodes (100 to 300 microns) is not enough, the iWave offers an improved coherence by factor 10. Moreover, instruments using an acousto-optic deflector (AOD) prefer a laser with narrow linewidth. Because of the wavelength-dependent beam deflection, only narrow linewidth lasers achieve smallest nodes and focus diameters. Broader linewidth results in blurred imaging results on the substrate.
