XTRA II –Single-Frequency Laser
- Typical linewidth <10 MHz
- Ideal source for Raman applications
- Up to 500mW @ 785nm
- Fiber coupling available
- ASE suppression > 40dB
The XTRA II provides three top features from one single unit: Gaussian beam profile, single-frequency operation and high output power. Incoherent ASE is suppressed by more than 40 dB, turning the XTRA II into the ideal choice for demanding Raman applications depending on a high signal-to-noise ratio. The integration of a high quality optical isolator as a standard feature ensures long term rock solid performance of the XTRA II.
Technical Information
Technical Information
785 nm is the standard wavelength of the XTRA II laser source.
Main specifications
| Wavelength | 785 nm |
|---|---|
| Power (free-beam) | Up to 500 mW |
| Long term power drift (10 h) | < 5 % |
| Spectral linewidth (typ.) | < 10 MHz |
| ASE suppression (typ.) | > 40 dB |
| Long term frequency drift (10 h) | < 1 cm-1 / 30 GHz |
| Optical isolation | 35 dB / 60 dB (optional) |
| Spatial mode | TEM00, M² < 1.7 |
| Beam diameter (typical @ 1/e²) | 2.2 mm |
| Divergence (typical) | < 1 mrad |
| Fiber coupling efficiency (typ.) | 50 % |
| Focusability | < 1 µm (depending on optics) |
| Polarization | Typical 500:1, linear, 45° clockwise with respect to base plate |
| Operating voltage | 90 – 260 VAC |
| Operating ambient temperature range | 15..35 °C |
| Dimensions laser head (L x W x H) | 270 x 122 x 85 mm³ |
| Dimensions power supply (L x W x H) | 175.1 x 179 x 69.5 mm³ |
For complete spec table please refer to the XTRA II brochure.
XTRA II – typical emission spectrum showing more than 40dB ASE suppression.
XTRA II – excellent frequency stability (≪ 1GHz).
XTRA II – excellent power stability (≪ 5 %).
Options & Related Products
Options & Related Products
Options:
- Fiber Option – FiberDock XTRA II
To provide full flexibility for OEM integrators, single-mode fiber-coupling is available on demand. Contrary to competing multimode lasers, the XTRA II achieves 250 mW output from a single-mode or even polarization-maintaining fiber. The fiber add-on consists of TOPTICA's patented FiberDock and an additional 35 dB optical isolator. Thus, highest coupling efficiency combined with best wavelength stability is guaranteed. - Fiber output collimator – FiberOut
Some applications demand a fiber-coupled laser and beam collimation at the end of a fiber. To provide a comprehensive solution, the FiberOut turns the divergent beam at the fiber end into a collimated beam again (0.5 mm - 4 mm @ 1/e² CA: 4.8 mm). FC/APC connectors are standard, others can be accommodated.
Related Products:
Technical Drawings
Applications
Applications
- Raman microscopy / spectroscopy
- Chemical process control
- Optical probing
- Laser tweezer
- Drug screening
- High Resolution Raman Microscopy
- An XTRA Laser Source for Raman Spectroscopy
XTRA II – data taken by TOPTICA customers: Raman spectrum of acetylsalicyacid.
