HP 8167A, Руководство пользователя, Страница: 153 / 262

C
Relative intensity noise
(RIN):
The square of the RMS optical power amplitude divided by the
measurement bandwidth and the square of the average optical
power , expressed in dB/Hz.
Conditions: coherence control o, temperature within operating
temperature range , frequency range 0.1 to 6 GHz.
Measurement with HP lightwave signal analyzer .
Relative wavelength
accuracy:
When randomly changing the wavelength and measuring the
dierences between the actual and displayed wavelengths , the
relative wavelength accuracy is 6 half the span between the
maximum and the minimum value of all dierences .
Conditions: uninterrupted TLS line voltage , constant power level,
temperature within operating temperature range , coherence control
o.
Measurement with wavelength meter .
Sidemode suppression
ratio:
The ratio of average signal power to the optical power of the highest
sidemode within a distance from 0.1 to 6 GHz to the signal's optical
frequency , expressed in dB .
Conditions: at a specied output power and wavelength range ,
temperature within operating temperature range , coherence control
o.
Measurement with HP lightwave signal analyzer using heterodyning
method.
Source spontaneous
emission:
The ratio of spontaneous emission power in 0.1 nm bandwidth to
signal power within a 62 nm window around the signal wavelength,
at ! maximum specied output power , expressed in dB per 0.1 nm.
Conditions: at maximum specied output power , temperature within
operating temperature range , coherence control o.
Measurement with optical spectrum analyzer at 0.1 nm resolution
bandwidth.
W avelength range: The range of wavelengths for which the specications apply .
W avelength repeatability: The uncertainty in reproducing the wavelength after detuning and
re-setting the wavelength. The wavelength repeatability is 6 half the
span between the maximum and the minimum value of all changes .
Conditions: uninterrupted TLS line voltage , constant power level,
temperature within operating temperature range , coherence control
o.
Measurement with wavelength meter .
W avelength resolution: The smallest possible displayed wavelength increment / decrement.
W avelength stability: The change of wavelength during a given time span, expressed as 6
half the span between the maximum and the minimum wavelengths .
Conditions: uninterrupted TLS line voltage , constant wavelength-
and power level settings , coherence control o, temperature within
61 K, time span as specied.
Measurement with wavelength meter
Specications C-3