WebPassing a single laser beam through a vapor cell of a two-level gas results in basic laser absorption spectroscopy. This affects the number of atoms in the ground state and excited state, but the random thermal motion of absorbing atoms causes Doppler broadening. The horizontal velocity parallel to direction of laser propagation, v z, of these WebApr 15, 2024 · We report on a frequency stabilized laser system with a variable linewidth at a wavelength of 404.7 nm used as an incoherent repump on the 6P30↔7S31 transition in mercury. By directly modulating the laser diode current with Gaussian white noise, the laser linewidth can be broadened up …
Birefringent atomic vapor laser lock in a hollow cathode lamp
Web19) laser in helium, and demonstrated by Corwin et al. [4] in the case of Rb vapor with a diode laser. 1 The dichroic laser-lock technique Corwin et al. [4] described the principle of this locking tech-nique, which they called dichroic-atomic-vapor laser lock (DAVLL). Let us consider an alkali-vapor absorption cell, placed in a magnetic field. Web18.5.3 Birefringent Filter. ... giving a discriminant signal to lock the thick-etalon center frequency to the scanning cavity mode frequency (standard dither-and-track circuit). ... ipm up hd2 software update
Atom-based stabilization for laser-pumped atomic clocks NIST
WebJun 15, 2006 · We describe a novel technique for stabilizing frequency shifts in laser-interrogated vapor-cell atomic clocks. The method suppresses frequency shifts due to changes in the laser frequency, intensity and modulation index as well as atomic vapor density. The clock operating parameters are monitored using the atoms themselves, … Webtechnique implemented directly on UV diode lasers by combining the dichroic atomic vapor laser lock and the resonant transfer cavity lock. As an example, we demonstrate a stable locking with frequency standard deviations of approximately 200 KHz and 300 KHz for 399nm and 370nm diode lasers in 20 minutes. WebWe report a robust method of stabilizing a laser to the frequency of an atomic transition using a hollow cathode lamp. In contrast to the standard dichroic atomic vapor laser lock method, which uses dichroism induced by a longitudinal magnetic field, we employ birefringence induced by a transversal magnetic field. We applied this method to the … ipm unknown mpi_status_count