Extended Tuning Laser
We offer two types of extended tuning devices, both of which allow rapid tuning at fixed temperature in a wider range than standard DFB lasers. The QC-ET (described here) allows fully continuous tuning over 0.4% of the central wavelength, while the QC-XT allows piece-wise continuous tuning over 2% of the central wavelength.
QC-ET Extended Tuning DFB Sources use a dual current control to extend the mode-hop free tuning to more than 0.4% of the central wavelength (>6 cm-1 at 1270 cm-1). While the first laser input allows direct intensity modulation in the same manner as standard DFB lasers, the integrated heater current IT allows to offset the wavelength much faster than the temperature change of the heatsink temperature would do.
Key Benefits:
- Increased wavelength scanning span fully electrically (Increased electrical wavelength scan)
- Wavelength dither and ramps as in conventional DFB
- DFB wavelength reproducibility
- DFB quality linewidth and noise