A high coherence, high stability laser for the photonic local oscillator distribution of the atacama large millimeter array

被引：23

作者：

Cliche, JF ^{[1
]}

Shillue, B ^{[1
]}

Latrasse, C ^{[1
]}

Têtu, M ^{[1
]}

D'Addario, L ^{[1
]}

机构：

[1] DiCOS Technol Inc, Quebec City, PQ G1P 4R7, Canada

来源：

GROUND-BASED TELESCOPES, PTS 1 AND 2 | 2004年 / 5489卷

关键词：

ALMA; laser; coherence; linewidth; stabilization; interferometer; fiber; LO distribution;

D O I：

10.1117/12.580246

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the architecture and the characterization results of a Master Laser prototype that can be used to distribute a phase-coherent millimeter wave reference within the Atacama Large Millimeter Array. This source is obtained by frequency-locking a 1556-nm narrow linewidth DFB fiber laser to a two-photon transition in rubidium 85 at 778 nm after second harmonic generation in a non-linear waveguide crystal. The prototype yielded an absolute wavelength of 1556.210 843 nm, a stability of 2x10(-12) at T = 1 s, a linewidth of 2 kHz over 1 ms, a coherence of 40% at 50 kin over 1 ms, and a RIN below -145 dBc/Hz for f>10 MHz. Using this laser, the transmission of an 18.6 GHz reference over 10 km of fiber was achieved with a residual phase fluctuations lower than 0.22 degrees RMS (33 fs RMS) over 10 s.

引用

页码：1115 / 1126

页数：12

共 16 条

[1] Absolute frequency measurement of a laser at 1556 nm locked to the 5S1/2-5D5/2 two-photon transition in 87Rb [J].