TOPTICA will feature the frequency comb DFC-CORE at SPIE Photonics West 2016 in San Francisco 16-18 February.
The DFC is now available in a compact one-box format including electronics. This fiber-based system uses difference frequency generation (DFG) to create an offset-free output at 1550 nm, and no active stabilization of the offset frequency is necessary.
Due to this solid passive operation, the DFC-CORE achieves a low phase noise of less than 32 mrad in a spectral interferometry measurement. Consequently, when locked to an RF reference, its high stability results in an a deviation of less than 1x10-13 in one second. The DFC-CORE allows for complete frequency-stabilized laser systems, including the frequency comb, wavelength extensions and diode lasers referenced to the comb.