Agilent Technologies Agilent 8164A Guide de l'utilisateur télécharger pdf (Page 126)

Performance Tests Power Tests

126 Agilent 81600B Tunable Laser Source Family, Fourth Edition

Set the output power of the TLS module to:

6 Determine filter transmission characteristic, as described in step 3 on

page 118. You may skip this step if the characteristic has already been

determined. This value relates to measurements performed in vacuum.

7 Determine the minimum value of the filter transmission, that is the

actual Fiber bragg Grating center wavelength λ

a Check for the minimum transmitted peak power in the table.

b Mark the associated wavelength set on the Tunable Laser, TLS_λ

and note the value in the Test Record.

c Mark the associated displayed on the Optical Spectrum Analyser,

OSA_λ

, and note the value in the Test Record.

8 Record the spectrum at minimum filter transmission:

Set the TLS to the wavelength of minimum transmission (TLS_

Check that the laser output is activated.

9 Set the Optical Spectrum Analyzer:

a Set span to 30 nm.

Press [Span] then enter this value.

b Set the resolution bandwidth (RBW) to 1 nm.

Press [AMPL], press [BW Swp] then enter this value.

c Set the sensitivity to -90 dBm.

Press [AMPL], press [SENS] then enter this value.

d Set the center wavelength to OSA_λ

Press [Center] then enter this value.

e Set the reference level to -40 dBm.

Press [AMPL], press [Ref LVL] then enter this value.

Output Power setting for Total SSE - Low SSE Output:

Tunable Laser Source module Power (P)

Agilent 81600B #200, Output 1 + 2.000 dBm*

Agilent 81600B #160, Output 1 - 4.000 dBm*

Agilent 81600B #150, Output 1 - 3.000 dBm*

Agilent 81600B #140, Output 1 -13.000 dBm

The laser output is limited to its maximum possible value at this wavelength. The

display will probably show Exp

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Agilent Technologies Agilent 8164A Guide de l'utilisateur Page 126