EXTERNAL CAVITY TUNABLE LD LIGHT SOURCE ECL-210
7-15
7.9. Setting Wavelength
LD.ON
APC.ON
COH.ON
STATUS
1
LD
APC
COH
CURR
TEMP
POWER WAVE
FINE
MODE
2
3
4
5
6
7
8
CHANNEL
CHANNEL
ECL controls the two components, PBPF and FLF, in selecting wavelength independently. It
takes time more or less for FLF to be stable.
Here shows the procedure of setting wavelength and the internal sequence.
1) Select the target unit on MLS. (Refer 7.4. Selecting a unit in MLS)
2) Set MODE to change to WAVE using [MODE] key
3) Set wavelength using the shuttle switch. (Refer 7.7. Shuttle switch)
4) OBPF and FLF is controlled to the set wavelength.
5) If the present value is off the point much, the wavelength value is calculated based on the
sensor output attached to OBPF.
6) When the OBPF wavelength tolerance becomes less than Å}0.2nm, the wavelength value is
calculated based on FLF monitor signals.
7) The status LED is lit until OBPF and FLF values goes into a range.
NOTE
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