10 • Operation
NEW FOCUS, Inc.
Figure 3:
Responsivity of
the
photodiode
used in the
Model 1801
(DC Version).
Figure 4:
Responsivity of
the
photodiode
used in the
Model 1811
(DC Version)
Figure 5:
Typical
frequency
response (top)
and noise floor
(bottom). At DC
the noise floor
is 3.3 pW/
for Model 1801
& 2.5 pW/
for Model 1811
0.6
0.4
0.2
0.0
800
600
1000
1200
Wavelength, nm
Responsivity, A/W
400
800
1000
1200
1400
1600
1800
0.00
0.20
0.40
0.60
0.80
1.00
Wavelength, nm
Responsivity, A/W
Hz
Hz
Frequency, MHz
10 dB/div
0
40
80
120
160
200
18X1 HS rcvr rev G.fm Page 10 Thursday, September 20, 2001 2:08 PM
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