Download Model 6800 Tunable Laser Controller

Principles of Operation
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Figure 29
Drawing of Important
Angles and Optimal Pivot Point
The Model TLB-6800-LN controller provides current, voltage, and
temperature controls to the laser head as well as manual, and computer
controlled input/output interfaces. The low-noise current supply drives the
diode in the laser head, controlling the output power. The voltage controller
drives the piezo in the laser head, controlling the lasing wavelength. Finally,
the temperature control regulates the laser-cavity temperature, providing a
stable-output wavelength.
The laser wavelength is also affected by the current through the diode.
Changing the diode current affects the refractive index of the diode lasers and
therefore, the laser cavity length. The magnitude of the effect is diode
dependent, but is typically 25-150 MHz/mA.