- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Transportable 1555-nm Ultra-Stable Laser with Sub-0.185-Hz Linewidth
摘要： We present two cavity-stabilized lasers at 1555 nm, which are built to be the frequency source for a transportable photonic microwave generation system. The frequency instability reaches the thermal noise limit (7 × 10?16) of the 10-cm ultra-low expansion glass cavity at 1–10 s averaging time and the beat signal of the two lasers reveals a remarkable linewidth of 185 mHz.
关键词： cavity-stabilized,linewidth,frequency instability,1555-nm ultra-stable laser
更新于2025-09-23 15:19:57
-
[IEEE 2019 Joint Conference of the IEEE International Frequency Control Symposium anEuropean Frequency and Time Forum (EFTF/IFC) - Orlando, FL, USA (2019.4.14-2019.4.18)] 2019 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (EFTF/IFC) - Development of Ultra-stable Clock Laser System for Space Applications
摘要： The National Time Service Centre of China is developing a 698 nm ultra-stable clock laser system for dedicated use in a space strontium optical clock. This report present the development of this system. The laser reaches a frequency instability of 3.5×10?15 at 1 s averaging time and the linewidth is about 1.3 Hz.
关键词： Laser stabilization,Ultra-stable laser,Fabry-Perot
更新于2025-09-19 17:13:59
-
Stabilizing diode laser to 1?Hz-level Allan deviation with atomic spectroscopy for Rb four-level active optical frequency standard
摘要： We achieve a compact ultra-stable 420 nm blue diode laser system by immediately stabilizing the laser on the hyperfine transition line of Rb atom. The Allan deviation of the residual error signal reaches 1 Hz-level Allan deviation within 1 s averaging time, and the fractional frequency Allan deviation is 1.4 × 10?15∕√?? , which shows the best result of frequency-stabilized lasers based on the atomic spectroscopy without Pound–Drever–Hall (PDH) system. The signal-to-noise ratio of the atomic spectroscopy is evaluated to be 3,000,000 from the Allan deviation formula, which is the highest record, to the best of our knowledge. The frequency noise suppression characterization is demonstrated and the maximal noise suppression can be near 40 dB at 6 Hz. As a good candidate of pumping source, the ultra-stable 420 nm diode laser is successfully used in our Rb four-level active optical frequency standard system. The method can be easily extended to other wavelengths ultra-stable lasers with a Allan deviation of 10?15 level retaining an atomic reference with low cost and low complexity while in the absence of an expensive and complicated PDH system.
关键词： ultra-stable laser,Rb four-level active optical frequency standard,atomic spectroscopy,Allan deviation,frequency noise suppression
更新于2025-09-19 17:13:59
-
[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Development of ultrastable lasers at 1. 5μm
摘要： We report the development of ultrastable lasers at 1.5μm. Through PDH method, the fiber lasers are locked to two ultra-stable optical cavities with finesse of 483000 and 148000 respectively. Through comparing two similar ultrastable laser systems, the linewidth of 0.68Hz and the fractional frequency instability of 2.7×10-15 at 1s averaging time are achieved.
关键词： finesse,ultra-stable laser,fractional frequency instability
更新于2025-09-16 10:30:52
-
[IEEE 2019 Joint Conference of the IEEE International Frequency Control Symposium anEuropean Frequency and Time Forum (EFTF/IFC) - Orlando, FL, USA (2019.4.14-2019.4.18)] 2019 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (EFTF/IFC) - A Novel Laser Activated Atom Source for Portable Strontium Optical Lattice Atomic Clocks
摘要： Atomic clocks have been in common use since the 1950s and over this period the clock community has had two main goals: increasing the performance of the clocks and increasing their portability. At Birmingham we aim to compress a strontium optical lattice clock, a clock with an extremely high accuracy, into a portable package. Many novel approaches need to be employed to allow such a clock to operate with a favorable SWaP while maintaining the low instability and uncertainty that makes optical clocks a desirable frequency standard. The focus of this work is to use laser activation of a strontium compound as the atomic source for the clock. Previously work published by this group [1] demonstrated that it is possible to release the strontium atoms from strontium oxide successfully load a magneto-optical trap (MOT).
关键词： Ultra-stable Laser Sources and Optical Frequency References,Optical Ion and Neutral Atom Clocks
更新于2025-09-11 14:15:04
-
A vibration-insensitive-cavity design holds impact of higher than $$100g$$100g
摘要： In this paper, we report a robust and vibration insensitive optical cavity design. The robustness of the supporting structure was tested by dropping an aluminum and a ULE cavity model mounted in the supporting frame onto an optical table from a height of about 250 and 20 mm repetitively. The impact acceleration on hitting the table was estimated to be higher than 100g. The success of the test demonstrated that the design was very robust. Meanwhile, the vibration sensitivities of the cavity in three orthogonal directions were measured to be 0.8 × 10?10∕g, 2.5 × 10?10∕g and 1.5 × 10?10∕g, respectively. The robustness and low vibration sensitivity suggested that the design was suitable for transportable system and might be a good candidate for space applications.
关键词： Optical cavity,Space,Transportable,Ultra-stable laser
更新于2025-09-10 09:29:36