Integrated Photonics

光外差

Optical Heterodyning

A technique used in optical communications and sensing where two optical signals of slightly different frequencies are combined to generate a beat signal at the difference frequency, enabling high-resolution detection and frequency conversion. / 一种用于光通信和传感的技术，将两个频率略有不同的光信号混合以产生差频处的拍频信号，从而实现高分辨率检测和频率转换。

Knowledge type: 工艺技术
First proposed or discovered
Proposer: Turkey Farm member
Creator: 农场主
Last updated: 2026-11-13 23:06:30

Sub-knowledge points

Phase-locked Loop (PLL)Pound-Drever-Hall (PDH) Locking

Higher-order knowledge points

Coherent Optical CommunicationOptical Frequency Comb

Main parameters and performance indicators

Intermediate Frequency (IF): The frequency of the beat signal, typically in the radio frequency (RF) range.Local Oscillator (LO): A stable reference laser used to mix with the signal laser.

Open problems

No unresolved problem recorded yet

Related literature

ranked by community stars

Receiver-DSP-Aided Sub-THz Optical Heterodyning Using PDH Locking With Direct Laser ModulationOpen source

光外差

Sub-knowledge points

Higher-order knowledge points

Main parameters and performance indicators

Open problems

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