DALUT31 Series: Fourfold Signal Strength and Improved Signal-to-Noise Ratio

DALUT31 Series: Four times the signal strength and improved signal-to-noise ratio. (Copyright: LASER COMPONENTS Germany GmbH)

With the DALUT31 series, LASER COMPONENTS has developed pyroelectric differential detectors in voltage mode that offer the highest sensitivity while minimizing noise contributions. The company has further developed the design of the proven Advanced-LTO infrared detectors for this purpose. The new detector series uses an ultrathin LTO crystal, combining the advantages of DLaTGS and conventional LTO detectors.

As with the previous ALT31/ALUT31 series, the circular active area (diameter: 1.3 mm) is divided into four quadrants, which are connected in series. This results in the output signal being amplified by a factor of four, while the internal noise increases only by a factor of two. Overall, the detectivity (D*) of the detector doubles due to this design, reaching approximately the performance level of DLaTGS detectors.

Additionally, the DALUT31 series employs a differential pyroelectric detector architecture to suppress environment-induced common-mode disturbances. Under real measurement conditions, this improves the signal-to-noise ratio of the entire system by more than just the square root of 2.

The detectors of the DALUT31 series are manufactured in a certified Class 7 cleanroom, tested under realistic environmental conditions, and delivered as standard in a hermetically sealed TO-39 package. Thanks to their modular design, the advanced LTO infrared detectors can be individually adapted to the requirements of different systems, offering the highest reliability even for demanding scientific applications.

The DALUT31 series combines the proven stability of LTO detectors with the high broadband sensitivity of the detector architecture developed by LASER COMPONENTS. This opens up new possibilities for spectroscopic applications. Typical fields of use include Fourier-transform infrared spectroscopy (FTIR), non-dispersive infrared spectroscopy (NDIR), and terahertz detection (THz).