Linearity Limits of Biased 1337 Trap Detectors

TL;DR

This study measures how bias voltage extends the linear response range of silicon photodiode-based light trap detectors across various wavelengths and beam sizes, finding significant improvements without damage.

Contribution

It provides new measurements of bias voltage effects on the linearity limits of silicon trap detectors at multiple wavelengths and beam sizes.

Findings

Bias voltage extends linearity by over 10 times for narrow beams.

Bias voltage extends linearity by over 30 times for wide beams.

No irreversible damage observed at high irradiance levels.

Abstract

The upper power limit of linear response of light trap detectors was recently measured [2,3]. We have completed this measurement with test of traps with bias voltage at several visible wavelengths using silicon photodiodes Hamamatsu S1337 1010 and made a brief test of S5227 1010. Bias extends the linearity limit by factor of more than 10 for very narrow beams and more than 30 for wide beams [5]. No irreversible changes were detected even for the highest irradiance of 33 W/cm2 at 406nm. Here we present measurement of minimal bias voltage necessary for 99%, 99.8% and 99.95% linearity for several beam sizes.