Responsivity of detectors for radiant power of lasers

11.03.2011

Project closed.
The results were approved and published in the KCDB and in Metrologia, 2010, 47, Tech. Suppl., 02003.


Progress Report of 15.02.2010

In 2009, the project was completed, i.e. pre-Draft A was approved by the participants, Draft A and Draft B were prepared and approved by the participants.

Time schedule of the project:

Technical Protocol agreed:2004-01-12
 2005-02-02 (last change)
Start of Measurements:2005-01-01
End of Measurements2007-09-13
All reports received:2007-11-13
Pre-Draft "A" published:2009-03-03
First draft of Draft "A":2009-07-29
Draft "A" approved:2009-10-02

Draft "B" approved by participants and submitted to EURAMET TC-PR: 2009-10-02


Progress Report of 20.02.2009

In 2008, the pre-Draft A was prepared and is momentarily in the stage of final approval from all participants. In 2009 the draft A is planned.


Progress Report of 07.03.2007

The following laser lines and power levels were selected for this first part of the intercomparison on high power lasers:

NoLaser typeWavelengthPower LevelApprox. Beam Diameter
1Argon ion514.5 nm1 W5 mm
2Nd:YAG1064 nm1 W5 mm
3Nd:YAG1064 nm10 W5 mm
4CO210.6 µm1 W5 mm
5CO210.6 µm5W5 mm

The project was agreed on in January 2005. Also in January 2005, the measurements for the two transfer detectors on the agreed laser lines and power levels started at PTB. In 2005, measurements were performed in D, S, USA, F, D, ZA, and AUS. In 2006, measurements were performed in D, J, UK, ROM, DK, in 2007 measurements were performed in D. The outstanding measurements in AUS, UA and finally D are planned in 2007. In 2006, NL withdrew from the comparison.

For the second part, dealing with power levels of 100 W (Nd:YAG, CO2) and 1000 W (CO2), a new EUROMET project will be started. It is planned to send out the questionnaire for this intercomparison in the beginning of 2008, after finishing the measurements for the first part of the intercomparison.


Progress Report of 29.03.2006

The following laser lines and power levels were selected for this first part of the intercomparison on high poer lasers:

NoLaser typeWavelengthPower LevelApprox. Beam Diameter
1Argon ion514.5 nm1 W5 mm
2Nd:YAG1064 nm1 W5 mm
3Nd:YAG1064 nm10 W5 mm
4CO210.6 µm1 W5 mm
5CO210.6 µm5W5 mm

The project was agreed on in January 2005. Also in January 2005, the measurements for the two transfer detectors on the agreed laser lines and poewr levels started at PTB. In 2005, measurements were performed in D, S, USA, F, D, ZA, and AUS. In 2006, measurements are planned in NL, D, DK, J, UK, UA, ROM, D.

For the second part, dealing with power levels of 100 W (Nd:YAG, CO2) and 100 W (CO2), a new EUROMET project will be started. It is planned to send out the questionnaire for this intercomparison in the beginning of 2007, after finishing the measurements for the first part of the intercomparison.


Progress Report of 07.03.2005

The technical protocol was prepared. The project was agreed on in January 2005. On January 3rd, 2005, the measurements for the two transfer detectors on the agreed laser lines and power levels started at PTB. In 2005, measurements are planned in D, S, USA, F, D, ZA, AUS.


Last year it was decided to split the comparison into two parts/projects. In the first part, the following laser lines and power levels were selected:

NoLaser typeWavelengthPower LevelApprox. Beam Diameter
1Argon ion514.5 nm1 W5 mm
2Nd:YAG1064 nm1 W5 mm
3Nd:YAG1064 nm10 W5 mm
4CO210.6 µm1 W5 mm
5CO210.6 µm5W5 mm

For the second part, a new EUROMET project will be started.For the first part of the comparison a new questionnaire was submitted to all EUROMET contact persons on April 07th 2004. PTB has developed techniques based on electrically calibrated laser radiometers and calorimeters to calibrate working standards for laser power and energy.

The dynamic range (at present from 1 nW to 1 kW) shall be extended as well as the spectral range to offer calibrations for high power C02 lasers and eximer lasers.

 

Further Information

Progress report submitted in May 2004. Progress report available as of March 2003.

Subjects
Photometry and Radiometry (PR)
Coordinator
Dr Stefan Kueck, PTB (Germany)
Coordinating Institute
PTB (Germany)
Further Partners
CSIRO
NILPRP
KSRIM
CSIR-NML
NMIJ, Japan