Moku:Lab多合一测量仪中激光稳频/锁频功能介绍

发布时间： 2018-10-31 11:47 来源：泰初科技（天津）有限公司

稳定的激光频率对专业测量或者时间/频率标准领域中的许多系统都至关重要。Moku:Lab激光锁频/稳频是一个高性能激光锁定系统，具备锁定诊断和一些自动化程序，可以使用各种激光锁定技术锁定激光，该系统可用于大多数激光器和频率参考比如PDH锁定（Pound-Drever Hall, PDH）、外差偏移锁定（Heterodyne offset phase locking）、RF锁定（RF locking）和抖动锁定（Dither locking）。此外，Moku激光锁频还可用于稳定连续波激光器的频率。

PDH激光锁频原理

主要特点
•Block diagram view of the signal processing chain

信号处理框图
•Demodulate signals with internal or external local oscillator

使用内部和外部本机振荡器解调信号
•Scan resonances with sawtooth or triangle waveforms

扫描锯齿波或三角波共振
•Observe signals at different locations in the signal processing chain using an integrated oscilloscope

使用内置示波器观测在信号处理过程中不同位置的信号
•Quickly lock to any zero-crossing in the error signal using the ‘Tap-to-Lock’ feature

使用“点击-锁定”功能快速锁定到误差信号的任一零交叉点。
•Low-pass filter demodulated signals with up to fourth order infinite-impulse response filters

低通滤波器即高达四阶无限冲激响应滤波器解调信号
•Individually configure high- and low-bandwidth PID controllers for fast and slow feedback

可单独配置的高带宽、低带宽PID控制器用于高频、低频反馈
•Observe signals with respect to the scanning voltage using the ‘Scope-Scan Lock’ feature

使用范围内扫描锁定功能观测与扫描电压有关的信号

典型参数
•Demodulate with frequencies up to 200 MHz with 3.55 µHz resolution
解调高达200 MHz频率，频率分辨率3.55 µHz
•Generate modulation signals at up to 200 MHz
生成高达200 MHz的解调信号
•Scan resonances with sawtooth or triangle waveforms at up to 1 MHz
扫描高达1 MHz锯齿波或三角波共振
•Generate control signals at a sampling rates of 31.25 MSa/s
以31.25 MSa/s采样率生成控制信号
•Continuously acquire data at up to 1 MSa/s
以高达1 MSa/s持续采集数据
•AC / DC input coupling
AC / DC输入耦合
•50 Ω / 1 MΩ input impedance
50 Ω / 1 MΩ输入阻抗
•Adjust the low-pass filter cut-off frequency between to 2.081 kHz and 28.13 MHz
可在2.081 kHz - 28.13 MHz之间调整低通滤波器截止频率

Moku激光稳频/锁频功能的技术参数

Metric	Specification	Notes
sample rate	61.25 MHz
sample rate slow pid	488.28 kHz
latency	35 degrees at 100 kHz
INPUT
input frequency range	0 to 200 MHz
Input gain settings	-20 dB, 0 dB, + 24 dB, + 48 dB
IIR
IIR low pass filter order	up to 4	Implemented as a cascade of two SOS filters.
IIR low pass filter corner frequencies	1 kHz - 31.25 MHz
IIR low pass filter coefficient width	32 bits	30 fractional bits, 1 integer bit, 1 signed bit
AUX
Aux frequency range	0 to 200 MHz	1 mHz increments
Aux output destinations	None, output 1, output 2, both.
LO
LO frequency range	0 to 200 MHz	1 mHz increments
LO sources	Internal, external, external with PLL
SCAN
Scan frequency range	0 to 1 MHz	1 mHz increments
Scan waveform types	Sawtooth, triangle.
Scan output destinations	None, output 1, output 2, both.
PLL

FAST PID
Fast PID sample rate	62.5 MHz
Fast parameters	Full single PID parameter set.
SLOW PID
Slow PID sample rate	488.28 kHz
Slow paramaeters	Full single PID parameter set.

标签：	Moku:Lab测量仪，激光稳频/锁频，高频锁相放大器

泰初科技（天津）有限公司

Moku:Lab多合一测量仪中激光稳频/锁频功能介绍

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