microwave
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Narrow Linewidth Laser Source (1 MHz200KHz)
The narrow linewidth laser module adopts the imported butterfly pump laser, combined with the professional design of the laser drive circuit and TEC control circuit to ensure the safe and stable operation of the laser. This laser can be used in scientific research, production testing and other fields. It is an ideal light source for optical fiber sensing and laser radar. It can provide various module packages according to customer requirements.
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HY-EAS Series EA Modulated Laser Source
HY-EAS series EA modulated laser light source integrates the functions of DFB laser and EA modulator. It has the characteristics of low chirp, low driving voltage (Vpp:2~3V), low power consumption and high modulation efficiency. It is widely used in high-speed optical fiber communication systems such as 10Gbps and 40Gbps and microwave photonics.
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HY-DS521 SLD desktop light source
Superluminescent light emitting diode (SLD) high bias, dual output desktop light source, the output power is not higher than 3mW. Built-in microcomputer to implement safety monitoring, using high-precision constant current source design and high-precision pulse width modulation (PWM) precision temperature control technology. The output optical power and spectrum are stable, the production process control and test process are strict, and the long-term stability is better than 2%(8hr). It is suitable for photoelectric detection and experiment in production line, test line, laboratory and other application conditions.
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HY-DS511 SLD desktop light source
Super luminescent diode (SLD) low bias, dual output desktop light source, the output power is not higher than 3mW. Built-in microcomputer to implement safety monitoring, using high-precision constant current source design and high-precision pulse width modulation (PWM) precision temperature control technology. The output optical power and spectrum are stable, the production process control and test process are strict, and the long-term stability is better than 2%(8hr). It is suitable for photoelectric detection and experiment in production line, test line, laboratory and other application conditions.
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Heavy release-the first domestic 110GHz electro-optic modulator successfully developed [reprinted]]
Recently, the first domestic 110GHz electro-optical intensity modulator product was successfully developed in the National Information Optoelectronics Innovation Center (NOEIC), and was verified and ordered by many industrial customers. The modulator takes the domestic thin film lithium niobate chip as the core and can work in C and L bands. It has the characteristics of ultra-high bandwidth, ultra-high speed, low chirp, low driving voltage, high linearity and so on. Its 3dB bandwidth is as high as 110GHz. It is the first electro-optic modulator product with a bandwidth exceeding 110GHz in China. Its key technical indicators have reached the international advanced level, it will be widely used in optical communication, optical interconnection, optical computing, photoelectric measurement, microwave photonics and other broadband optoelectronic information systems.
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Who has mastered the DFB laser dominance? China DFB laser layout analysis!
In recent years, with the widespread deployment of 5G, global traffic has grown rapidly and bandwidth has been rapidly improved. At the same time, the outbreak of the new coronary pneumonia epidemic has prompted a sharp increase in demand for data centers and fiber-to-the-home, bringing considerable demand to the optical communications industry. The market demand for optical modules, wavelength division devices, splitters and connectors continues to grow, and fixed networks and access networks have also ushered in a new construction cycle. The optical module is a key component of the optical communication equipment, and the optical communication device is the main component of the optical module, and its performance determines the upgrade and update of the optical communication network, and the laser is the most important electro-optical conversion device in the optical module. With the rapid development and breakthrough of semiconductor laser technology, semiconductor lasers have a series of advantages such as small size, light weight, high electro-optic conversion efficiency, strong stability, high reliability and long life. At present, the quality, wavelength range and output power of semiconductor laser products are rapidly improving, and the variety of products is becoming more and more abundant. The application of semiconductor lasers has covered the entire field of optoelectronics and has become one of the core technologies of optoelectronic science today. Therefore, semiconductor lasers are considered to be one of the most promising areas in the optoelectronic industry.
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According to the announcement of the State Intellectual Property Office, Huawei Technologies Co., Ltd. applied for a project called "an electro-optic modulator and related equipment", the public number is CN117170122A, and the application date is May 2022.
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Infrared photodetectors are widely used in gas sensing, meteorological remote sensing and space exploration. However, at present, traditional infrared detection materials are mainly based on indium telluride, indium gallium arsenic, mercury cadmium telluride, etc., which need to be grown by molecular beam epitaxy, and complex processes such as flip-chip bonding and coupling with readout circuits. Although the detection performance is high, it is limited by cost and yield.
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Narrow linewidth laser technology and progress
This paper first introduces the application requirements and architecture evolution of narrow linewidth lasers, and then introduces the research progress of the main cavity laser and the fixed external cavity feedback laser. Then, the newly developed adaptive distributed feedback narrow linewidth lasers are introduced, and the physical ideas, core devices and system performance of this new type of lasers are analyzed and discussed. Finally, the potential applications of narrow linewidth lasers are introduced with distributed optical fiber sensing, laser coherent communication and on-chip optical information processing as typical application fields, and the development prospects and future trends of narrow linewidth lasers are prospected.
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Theoretically, a fiber with a circular core should not produce birefringence, and the polarization state of the fiber will not change during propagation. However, in practice, regular the optical fiber in the production process, will be subjected to external force and other reasons, so that the thickness of the optical fiber is not uniform or bending, etc., it will cause the phenomenon of birefringence. When the fiber is subjected to any external interference, such as wavelength, bending, temperature, etc., the polarization state of light will become chaotic when transmitted in the regular fiber.
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