双梳光谱和测距的理想工具

1 GHz single-cavity dual-comb laser
1 GHz 单腔双梳激光器

• Two spatially separated pulse trains with >2 W per beam    两个空间分离的脉冲序列，每束光功率大于2 W
• <100 fs pulse duration     <100 fs脉冲持续时间
• Sub-cycle relative timing jitter    亚周期相对时间抖动（两路超快脉冲之间，时间抖动的幅值小于单个光学振荡周期，是超高精度同步的指标）
• Ultra-low relative intensity noise      相对强度噪声超低
• Fundamental Gaussian beam mode output    光束模式基膜高斯输出
• Tunable and long-term stable repetition rate difference      重复频率差异可调且长期稳定
• Compact system design 紧凑型系统设计

产品描述

The system produces a pair of modelocked femtosecond lasers (optical frequency combs) with a slightly different pulse repetition rate. In the time domain, the optical delay is rapidly swept through a range of 1 nanosecond at very high speeds. In the frequency domain, beat notes between each pair of optical comb lines are generated via heterodyne detection. Due to the gigahertz repetition rate, high power per comb line is obtained.

该系统输出一对锁模飞秒激光器（光学频率梳），二者脉冲重复频率略有差异。在时域上，光延迟以极高速度在 1 ns 范围内快速扫描；在频域中，每一组光梳齿线之间通过外差探测产生拍频信号。得益于千兆赫兹量级的重复频率，单根梳齿线可获得较高光功率。

Through a novel shared-cavity architecture, our system is able to achieve ultra-low noise simply in free-running operation. In particular, the laser pair is passively stable with highly correlated intensity, timing, and phase noise properties between the two combs. Since there is only one laser cavity and no high-speed locking electronics or optical amplification, most of the complexity of conventional dual-comb and ASOPS systems is removed, while providing a small footprint and superior performance.
本系统依托一种新型共腔结构，在自由运转状态下即可实现超低噪声。特别是这一对激光器具备被动稳定性，两把光梳之间的强度噪声、时间抖动以及相位噪声具有高度相关性。由于仅采用单一激光谐振腔，无需高速锁相电子学器件以及光放大模块，该方案省去了传统双光梳系统、异步光脉冲采样（ASOPS）系统绝大部分复杂硬件；同时设备体积紧凑，且具备更优异的性能。

可选项

• Repetition rate control 重复率控制
• Integrated second harmonic 集成二次谐波
• Fiber coupled configurations 光纤耦合配置
• Supercontinuum option (SCG) 超连续谱选项（SCG）
• Integrated  optical isolation 集成式光隔离

应用

• 泵浦-探测 采样
• 膜厚检测
• 气体检测与过程控制
• 精确测距

参数