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[Original] IdealPhotonics Small Classroom | Teaching Demonstration of Greenhouse Gas Monitoring System

2024-11-05 15:42:23

Shinohara Guang Xiao Sub-laboratory built an indoor carbon emission detection system by using TDLAS technology, and detected the indoor CO2 concentration change in real time, and successfully observed the second harmonic on the oscilloscope. The peak value of the second harmonic represents the intensity of laser absorption by gas.

[Original] IdealPhotonics Small Classroom | Talking about Light Modulation Technology

2024-11-05 14:59:54

The so-called optical modulation technology is a modulation technology in which a signal carrying information is superimposed on the carrier light wave. Laser modulation technology can be divided into amplitude modulation, phase modulation, frequency modulation, polarization modulation and so on. According to modulation methods, it can be divided into acousto-optic modulation, electro-optic modulation, magneto-optical modulation and so on.

Polarization extinction ratio tester-suitable for optical fiber and free space optical applications

2024-11-01 15:57:52

It has a full-speed USB 2.0 port for remote control, a UART port for interconnection between different CUBE, two analog outputs for closed-loop control of PM fiber automatic alignment system, and two general TTL input/output for measuring and controlling synchronization.

Technology and application of microwave photon signal generation

2024-08-13 09:51:56

The generation of high quality microwave and millimeter wave signals is very important for many applications, including radar systems, wireless communication, software radio and modern instruments. Traditionally, microwave signals are generated by electronic oscillators, but these electronic oscillators have limitations in achievable frequency, phase noise performance and distribution ability [1].

Microwave Photonic Sensor: High-speed and High-resolution Optical Sensing

2024-08-09 16:27:35

Microwave photonics provides a perfect solution to overcome these limitations by converting optical wavelength shift into microwave frequency shift. This makes it possible to use high-speed and high-resolution electronic measurement technology in microwave field. This paper will discuss several microwave photonic sensor architectures that can realize fast and accurate optical sensing.