BT Series Mini-Benchtop Laser

By Ondax

The BT Series Mini‑Benchtop Laser is designed specifically for Raman spectroscopy and analytical instrumentation, where wavelength stability and spectral purity are critical. It delivers ultra‑stable center wavelengths, narrow linewidth, and reliable output power, helping ensure consistent, repeatable Raman measurements in both research and routine laboratory workflows. BT lasers use Coherent SureLock™ technology, stabilized by a PowerLocker® Volume Holographic Grating (VHG). This design locks the laser to a precise wavelength and maintains stability across the entire 0–100% power range, reducing drift caused by temperature or power adjustments and preserving spectral accuracy during long measurements. Typically <0.5 wavenumber stability over long periods. Standard BT Series wavelengths include: - 638 nm - 785 nm - 830 nm - 1064 nm Custom wavelength options may also be available upon request, depending on application needs. The BT Series provides continuously adjustable output power, from a few milliwatts up to 500 mW (model‑dependent). This flexibility allows users to optimize signal strength while managing sample heating or photodamage. Typical long‑term power stability is better than 1–3%, supporting consistent Raman signal levels during extended experiments or repeated measurements. The BT laser offers a typical spectral bandwidth of ~0.08 nm (FWHM), enabling: - High spectral resolution - Improved Raman peak separation - Cleaner spectra with reduced background noise This is particularly helpful for materials with closely spaced Raman features. Yes. The BT Series is designed for plug‑and‑play laboratory use, featuring: - Touchscreen user interface - Simple front‑panel power adjustment - Integrated safety features (keyswitch, E‑stop, emission delay) - Internal drive electronics and temperature control No external laser controller is required. The laser reaches operating stability in under one minute, allowing fast startup and minimal wait time before measurements. For optimal performance, a few additional minutes can be allowed in highly sensitive applications. The BT Series comes standard with: - 105 µm core - 0.22 NA multimode fiber - FC/PC connector Optional patch cables are available with FC/PC or SMA connectors. Other fiber configurations may be available upon request. The BT laser is intended for standard laboratory environments: - Operating temperature: 0 °C to 40 °C - Non‑condensing conditions - Reasonable airflow for thermal dissipation No special cooling or environmental enclosure is required. Integrated safety features include: - Laser enable keyswitch - Emergency stop (E‑stop) - 20‑second emission delay - Remote interlock connections (lab door or enclosure) These features support compliance with Class 3B laser safety practices when properly implemented The BT Series supports: - Remote interlock connections (via rear terminal block) - USB‑to‑serial communication for basic remote control and monitoring This enables integration with lab automation or external control systems while retaining local front‑panel operation. Because we tightly control wavelength accuracy and tolerance, it is important to specify the reference medium used for wavelength measurement. Light travels slightly more slowly in air than in vacuum, causing the wavelength in air to be marginally shorter. To avoid ambiguity and ensure consistency, wavelengths in our datasheets are vacuum‑referenced, which is also the convention used by many spectroscopy databases. As an example, a HeNe laser specified at 632.991 nm in vacuum corresponds to 632.816 nm in air. This difference does not indicate a physical change in the laser, only a difference in how the wavelength is referenced.