The SHR utilizes an optical design based on an Echelle diffraction grating operating in high spectral orders, combined with a linear image sensor as the detector. With no moving parts, the SHR is powered and controlled via a Full-Speed USB interface and can be triggered using standard TTL-level signals from the laser source.
Light can be directed to the SHR either through a multimode optical fiber equipped with a diffuse attenuator (both included in the set) or directly, without a fiber.
Designed for precise, rapid measurement of absolute wavelengths for both CW and pulsed lasers, the SHR achieves remarkable accuracy of ±3 pm across a broad spectral range of 190–1100 nm. It also measures the FWHM of the spectral line and displays high-resolution spectra with a resolving power of up to 30,000 (6 pm in UV to 40 pm in NIR). Real-time spectrum monitoring is supported during wavelength tuning.
The SHR is managed via WLMeter software, which allows accuracy verification and adjustment using a reference wavelength, such as a He-Ne laser (e.g., 632.816 nm). The software also includes a "Lines Array" feature for tracking and saving wavelength changes over time.
In terms of resolution and precision, the SHR matches or exceeds the capabilities of long-focus monochromators (with focal lengths over 1000 mm and CCD detectors), while offering real-time, scan-free operation, compact size, and greater reliability.
Although not specifically designed for broad plasma emission analysis, the SHR can effectively analyze narrow spectral intervals (0.5 nm in UV to 18 nm in IR) when combined with a bandpass filter or a monochromator such as the high-aperture ML44.
