THORLABS BC207UV, Operating Manual

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BC207 Series
Chapter 10: Appendix
Rev: 8.1, 10-Jan-2022
Page 164
© 2022 Thorlabs
10.6 Power Ranges
The BC207VIS and BC207UV models offer a different input power range. Maximum and mini-
mum applicable power depends on the beam diameter, the selected optical filter and the
wavelength.
The model BC207VIS has a maximum responsivity at 550 nm, BC207UV at 200 nm. The dia-
gram below refers to the wavelength 400 nm for BC207UV(/M) and 700 nm for BC207VIS(/M).
The range within the unbroken boundary lines indicate the BC207 Series power range without
any filter. The operating power range is shifted towards higher values when a filter is used. The
range within the dashed boundary lines stands for the highest attenuation that is available from
the filter wheel (40 dB for BC207UV; 60 dB for BC207VIS). With other filter settings, the power
range is located between unbroken and dashed lines.
The max. and min. applicable power strongly depends on the actual beam diameter. As for this
reason, find first the beam diameter on the horizontal scale read out the power range with re-
spect to the used Beam Profiler model and it's filter setting.
Note
Please note that the above diagram represents the operating power range at the specified
wavelength. For different wavelengths the power range shifts towards higher values and thus,
needs to be adopted according to the wavelength depending
response curve of the sensor .
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