Teledyne LeCroy OE695G - Manual (Page 16)

OE695G Optical-to-Electrical Converter
10 922562-00 Rev A
statistical mean value of the mean measurement, note the Residual Dark
Level:___________ uW
7. Connect the patch/attenuator output cable to the OE695G optical input.
Press Clear Sweeps on the oscilloscope front panel, and using the
statistical mean of the mean measurement, note the Observed Power
Level:_____________ uW
8. Compute the normalized error fraction:
err-frac = [(Observed – Residual) – Input]/Input
The error fraction should be in the range –Δ < err-frac < +Δ where Δ is
determined by the sum of the magnitudes of the allowed OE695G
uncertainty (e.g., 10% or 0.1) and the optical power meter uncertainty
(e.g., 6% or 0.06). In this example Δ = 0.16.
9. If an incorrect result is obtained, repeat the measurement sequence
with careful cleaning and mating of the optical interfaces, which are
prone to variation from small particles, oils, or other non-idealities.
Optical Reference Receiver Response
Required Equipment

OE695G and compatible oscilloscope with 20 GHz or greater channel
bandwidth

< 1 ps FWHM optical pulsed laser source, 1550 nm optical wavelength

Variable optical attenuator
Procedure
1. Connect the OE695G to a compatible oscilloscope channel with a
channel specific calibration and allow to fully warm-up.
2. Preset the optical attenuator for high attenuation (safest for protecting
the OE695G).
3. Connect the optical attenuator to the pulsed laser source.
4. Connect pulsed laser source trigger output to oscilloscope
Aux input.