Santec TSL-210 - 8-5. Fine Tuning Function

TUNABLE LD LIGHT SOURCE TSL-210
8-3
8-5. Fine Tuning Function
The TSL-210 can control wavelength in a wide range by high precision control of the angle of
diffraction grating through the use of an electro-mechanical motor. In addition, the TSL-210 is
equipped with a piezo (PZT) to control wavelength with higher resolution. This fine-tuning
enables wavelength fine-tuning of < 0.001 nm within the coarse tuning range of about +/- 0.02
nm. When used in combination with a wavelength meter, the TSL-210 can be set with precision
of 0.001 nm.
PC
TSL
1
9
GP-IB
Wavelength meter
Coupler
Output
In a model with the frequency locking option, by impressing the appropriate external voltage on
the analog interface (AIF) connector at the rear panel, fine tuning control is available. This
control may be applied to frequency lock (Example 1, below) to feedback the frequency
deviation signal to the reference light source to the fine tuning control thus enabling stabilization
by feeding back the deviation signal from the Etalon module to the fine tuning control circuit.
(Example 2, below). (Refer to Section 9-6-B, External Control.)
O/E
FD
IF
TSL
Output
Reference light source
Control circuit
PI control, etc.
Frequency discriminator
Voltage
Frequency
TSL
OWL-10
Output
Control circuit
Made by Santec
(Example)
• Etharon module
• Cell
etc.
(Example 1)
(Example 2)
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