Atec Agilent-8703A - Manual (Page 6)

Table 4.
Lightwave source
characteristics
9
9 Lightwave source characteristics are described given a >30 dB return
loss optical termination.
10 Output power is 1 dBo less for systems with Option 100. This is a
class I (FDA (U.S.A.)) and class IIIb (IEC (Europe)) laser.
11 Average optical output power level can be controlled with an external
optical attenuator like the 8157A. The 8703A does not have an internal
optical attenuator.
12 The modulated optical output power level is set by the 8703A and
cannot be adjusted by the user.
13 Modulation index is defined as peak modulated optical power divided
by average optical power. For example, the 8703A FP configuration of
Table 4 shows an index of 25% (= 65 µW / 260 µW).
14 Laser reflection sensitivity is tested using a 95 % reflection, an optical
coupler (15 dB coupling factor and 1.5 dB main arm loss) and the optical
output powers shown in Table 4.
15 Isolation refers to the isolation between the 8703A’s optical modulator
and the internal laser. External sources must have built-in isolation.
Refer to the block diagram, Figure 1.
16 Harmonic levels are given for average optical powers and modulation
powers listed in Table 4. dBc rating is for dBe below the fundamental
modulation components.
Opt 210 Opt 220 Opt 100 Opt 100
Description (DFB laser) 10 (DFB laser) 10 with Agilent 83424A with Agilent 83425A
Wavelength 1550 ±10 nm 1308 ±10 nm 1550 ±10 nm 1308 ±10 nm
Spectral width <50 MHz <50 MHz <50 MHz <50 MHz
(typical)
Average optical
output power
11
Maximum: 600 µW (–2.2 dBm) 600 µW (–2.2 dBm) 500 µW (–3.0 dBm) 500 µW (–3.0 dBm)
Typical: 260 µW (–5.9 dBm) 260 µW (–5.9 dBm) 180 µW (–7.4 dBm) 180 µW (–7.4 dBm)
Minimum: 125 µW (–9.0 dBm) 125 µW (–9.0 dBm) 70 µW (–11.6 dBm) 70 µW (–11.6 dBm)
Modulation 130 MHz 130 MHz 130 MHz 130 MHz
bandwidth to 20 GHz to 20 GHz to 20 GHz to 20 GHz
Modulated 1 Hz 1 Hz 1 Hz 1 Hz
frequency
resolution
Modulated optical
output power
(typical)
12
Peak-to-peak: 130 µW (–8.9 dBm) 130 µW (–8.9 dBm) 90 µW (–10.5 dBm) 90 µW (–10.5 dBm)
Peak: 65 µW (–11.9 dBm) 65 µW (–11.9 dBm) 45 µW (–13.5 dBm) 45 µW (–13.5 dBm)
Modulation index 25% 25% 25% 25%
(typical) 13
Reflection sensitivity ±0.1 dB ±0.1 dB ±0.1 dB ±0.1 dB
(typical) 14
Laser isolation 15 80 dB 80 dB 80 dB 80 dB
Degree of 20:1 20:1 20:1 20:1
polarization
(typical)
Port return loss 15 dBo 15 dBo 15 dBo 15 dBo
(typical)
Harmonics <–9 dBc <–9 dBc <–9 dBc <–9 dBc
(typical) 16
Compatible fiber 9/125 µm 9/125 µm 9/125 µm 9/125 µm
6
Lightwave source and
receiver characteristics