Operator’s Manual
9
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 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.
5.
Configure the following settings on the oscilloscope:
•
Recall Default setup
•
Enable the channel with the OE695G, disable others
•
Configure the active channel for 1550 nm optical wavelength, 50
uW/div, Sin x/x interpolation
•
Configure the trigger for Aux In, Normal, and adjust the trigger level
for proper trigger
6.
Locate the optical pulse (reduce attenuation if necessary) and adjust
oscilloscope time settings to center the pulse on screen with 1 ns/div.
7.
Adjust the optical attenuator for peak pulse amplitude 60 uW.
8.
Set channel pre-processing averaging to 10,000.
