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Specifications
24
P
=power of i
i
λ
=wavelength of i
i
M =multiplication factor; for a source with a gaussian
envelope
M = 2.35; for other types of spectra, use M = 2.35 as well
Output power
The maximum output power at the specified center wavelength.
Conditions: Temperature within operating temperature range.
Measurement with power meter at the end of specified patchcord.
CW power stability
The change of the power level during given time span, expressed as
half the span of power changes relative to the mean power.
Conditions: uninterrupted line voltage, constant power level setting,
operating temperature change not more than ±∆T as specified.
CW power stability due to backreflection
The change of the power level, expressed as
changes relative to the mean power caused by variable backreflection
within given limits.
Conditions: uninterrupted line voltage, constant power level setting,
CW operation, operating temperature change within specified limits,
minimum return loss as pecified, all polarization states of
backreflection included.
Measurement: The change of the output power is monitored while the
source's susceptibility to backreflection is tested by disturbing the
laser oscillation with power reflected back into the laser, P
backreflection sensitivity depends on the absolute power level of P
and on the polarization state of P
At fixed power levels of P
maximum when the states of polarization (SOP) of P
source's output power) are identical. To achieve this condition a
polarization controller generates all SOPs of P
CW stability is a worst case value with respect to the SOP. The test
should be done at various power levels of P
the CW stability is specified for a range of backreflectances. However,
the highest backreflection is the most critical by experience.
Agilent 81650A/1A/2A/4A/5A/6A/7A User's Guide, Third Edition
th
longitudinal mode
th
longitudinal mode, in vacuum
±
.
back
, backreflection sensitivity has its
back
back
Definition of Terms
half the span of power
. The
back
back
and P
(the
back
in
. Thus the measured
back
to address the fact that
±
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