Abstract
We have developed and characterized a new kind of trap detector based on InGaAs photodiodes. The detector contains only two 10 mm diameter InGaAs photodiodes arranged in a transmission trap configuration with non-coaxial beam orientation. The detector has large active area, more than 9 mm in diameter, and a built-in linearity monitoring feature. One of the key advantages of the developed detector is polarization insensitivity - the difference in responsivity between two orthogonal incident polarization states is zero within the standard uncertainty of 0.3%. The spatial non-uniformity of the responsivity is less than 0.5% across the active area.
Original language | English |
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Pages (from-to) | 1-6 |
Number of pages | 6 |
Journal | Measurement Science and Technology |
Volume | 26 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1 May 2015 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Infrared
- InGaAs
- Metrology
- Photodetectors
- Polarization insensitive detector
- Transmission trap detector
- Trap detector