Optical Frequency Locked Loop for long-term stabilization of broad-line DFB lasers frequency difference

Abstract

We present an experimental realization of the Optical Frequency Locked Loop (OFLL) applied to long-term frequency difference stabilization of broad-line DFB lasers. The presented design, based on an integrated phase-frequency detector chip, is digitally tunable in real-time, robust against environmental perturbations and compatible with commercially available laser current control modules. We present a simple model and a quick method to optimize the loop for given hardware using only simple measurements in time domain and approximate laser linewidth. We demonstrate frequency stabilization for offsets encompassing entire 4-15 GHz capture range. We achieve < 0.5 Hz long-term stability of the beat note frequency for 1000 s averaging time. Step response of the system as well as phase characteristics closely adhere to the theoretical model.

6 pages, 6 figures

References in corpus (2)

• Hamiltonian design in readout from room-temperature Raman atomic memory
• Coupling of four-wave mixing and Raman scattering by ground-state atomic coherence

Cited by in corpus (16)

• Overcoming the rate-distance barrier of quantum key distribution without using quantum repeaters
• Phase-Matching Quantum Key Distribution
• Surpassing the rate-transmittance linear bound of quantum key distribution
• Wavevector multiplexed quantum memory via spatially-resolved single-photon detection
• Optical-domain spectral super-resolution via a quantum-memory-based time-frequency processor
• Modulation-free Laser Stabilization Technique Using Integrated Cavity-Coupled Mach-Zehnder Interferometer
• Realization of phase locking in good-bad-cavity active optical clock
• Coherent spin-wave processor of stored optical pulses
• Quantum optics of spin waves through ac Stark modulation
• Tutorial on laser locking techniques and the manufacturing of vapor cells for spectroscopy
• Spatial spin-wave modulator for quantum memory assisted adaptive measurements
• Continuous frequency tuning of an external cavity diode laser significantly beyond the free spectral range by sweeping the injection current
• Full C- and L-band tunable erbium-doped integrated lasers via scalable manufacturing
• Offset Lock with 440 GHz Range using Electro-Optic Modulation
• Superradiant parametric conversion of spin waves
• Standalone optical frequency-offset locking electronics for atomic physics