UV Photodetectors
Natural type IIa diamond, whose 5.5 eV-band gap eliminates visible and near-UV sensitivity and permits diamond detectors to operate at room temperature without cooling, is used as photoconductive material for production of "solar-blind" (visible and IR light blind) detectors, which are ideal sensors for measuring of absolute UV power with subnanosecond time resolution and without the use of light blocking filters.
In July 2003 the unique threshold UV photodetector (FPY-1) was developed, which is sensitive in a range of 190 ¸ 300 nm, capable to register weak optical signals. Sensitive threshold of UV detector arrives at (1-2) x 10-14 W/Hz1/2.
Photovoltaic photodetector FPY-1
APPLICATIONS
-
Ecology – control of the level pollution water;
-
Medicine – control of the level UV radiation in operating room;
-
Industrial and scientific instrument making - spectrometry, chromatography, astrophysical researches, measurement of power of lasers.
TECHNICAL SPECIFICATIONS of FPY - 1:
[Request Quotation]
|
Spectral range of sensitivity, nm |
190 ¸ 300 |
|
Bias voltage, V |
5 ¸ 200 |
|
Maximum of spectral response at wave length,
nm |
220 |
|
Sensitivity threshold at lmax,
up to, W/Hz1/2 |
(1¸2)
x 10-14 |
|
Sensitivity of UV range / sensitivity of Visible
range relationship, not less |
1 x 104 |
|
Noise voltage, V/Hz1/2 |
2,5 x
10-9 |
|
Constant time of the photoresponse, sec |
250 x
10-6 |
|
Dynamic range, W/cm2 |
10-12
¸ 1 |
|
Size of a photosensitivity area, mm2 |
4 ¸ 8 |
|
Weight, not more, g |
1,5 |
In December 2003 development of new photoreceived device based on FPY-1
has been started.
The relative spectral characteristic of sensitivity of FPY-1
Photoreceived device based on FPY-1
APPLICATIONS of photodetectors of FA - line
-
Monitoring the performance of excimer UV-lasers, UV-lamps and other UV-sources in the range of 190 ¸ 300 nm.
-
Monitoring the performance of UV-curing devices.
-
Monitoring the leakage of industrial UV-sources radiating in the UV range.
The test bench for measurement of photoelectric parameters of UV photodetectors
[Request Quotation]
| Characteristics |
|
|
|
| Model |
FA-1 |
FA-2 |
FA-3 |
Spectral sensitivity range, nm |
190 ¸ 30 |
||
| Bias voltage (not more than), V |
150 |
50 |
150 |
Maximum of spectral response at wave length, nm |
220 |
||
| *Maximum of spectral responsivity at lìàõ, A/W |
45 |
15 |
100 |
| Dark current (at Uopr= 30 V), pA
|
less than 10 |
||
Size of a photosensitivity area, mm2 |
1 |
||
| Overall dimensions, mm |
dia. 11, height 15 |
dia. 5,5 x height 28 |
19 x 6,5 x 7,5 |
| Construction (package) |
TO-8 metal-glass case |
TO-18 metal-glass case |
cermet 16 lead-out cover |
| Weight, not more, g |
3 |
1,5 |
1,5 |
Environment conditions: temperature from – 30 °C to +45 °C; relative
humidity less than 93 ± 3 % at normal temperature.
