Laser Frequency-Offset Locking at 10-Hz-Level Instability Using Hybrid Electronic Filters

Frequency stability and offset locking of a laser-diode-pumped Nd:YAG monolithic nonplanar ring oscillator.

The frequency stability of laser-diode-pumped, monolithic Nd:YAG solid-state unidirectional nonplanar ring oscillators was studied by heterodyne measurements. We obtained cw single-axial- and transverse-mode power of 25 mW at 1064 nm at a slope efficiency of 19%. Two independent oscillators were offset locked at 17 MHz with frequency fluctuations of less than +/-40 kHz for periods of 8 min.

Coherent Laser-Atom Interaction and its Application to Atomic Frequency Offset Locking

Electromagnetically Induced Transparency (EIT) refers to the phenomenon of rendering an otherwise opaque medium, transparent to a narrow band of light frequencies. Physics underlying this phenomenon and its use as atomic frequency standard has been discussed extensively in literature. An ultra-narrow linewidth of the EIT signal may be considered as a narrow band frequency filter, since it is as...

Quantum cascade laser-based mid-IR frequency metrology system with ultra-narrow linewidth and 1  ×  10⁻¹³-level frequency instability.

We demonstrate a powerful tool for high-resolution mid-IR spectroscopy and frequency metrology with quantum cascade lasers (QCLs). We have implemented frequency stabilization of a QCL to an ultra-low expansion (ULE) reference cavity, via upconversion to the near-IR spectral range, at a level of 1×10(-13). The absolute frequency of the QCL is measured relative to a hydrogen maser, with instabili...

Yb : YAG / I 2 optical frequency standard at 515 nm with instability at the level 10 – 15

Microresonator Brillouin laser stabilization using a microfabricated rubidium cell.

We frequency stabilize the output of a miniature stimulated Brillouin scattering (SBS) laser to rubidium atoms in a microfabricated cell to realize a laser system with frequency stability at the 10-11 level over seven decades in averaging time. In addition, our system has the advantages of robustness, low cost and the potential for integration that would lead to still further miniatu...