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.

领域：分子生物学,化工试剂/助剂,航空/航天,机械设备,其他

标签：Moku:Lab测量仪，激光稳频/锁频，高频锁相放大器