Pulsed Erbium-doped Fiber Amplifier Manufacturers

Box Optronics is a mature DFB laser source supplier in China. Guided by customer needs, it has launched a multi-channel DFB laser source that integrates multiple different wavelengths. Multiple wavelengths can be activated and used simultaneously, or only one wavelength can be operated separately. This laser source can be used for WDM devices, AWG devices, PLC devices, EDFA, and other fiber optic measurements and applications. The compact product structure is only for more efficient optical experimental research and development applications.

A gas detection laser is an instrument that uses laser technology to measure gas concentration. It emits a laser beam into the gas and then analyzes the absorption or scattering of the laser beam to infer the gas concentration. This method has high sensitivity and accuracy, and can achieve rapid, online monitoring of specific gases.

The linewidth of a laser, especially a single-frequency laser, refers to the width of its spectrum (typically full width at half maximum, FWHM). More precisely, it is the width of the radiated electric field power spectral density, expressed in terms of frequency, wavenumber, or wavelength. The linewidth of a laser is closely related to temporal coherence and is characterized by coherence time and coherence length. If the phase undergoes an unbounded shift, phase noise contributes to the linewidth; this is the case with free oscillators. (Phase fluctuations confined to a very small phase interval produce zero linewidth and some noise sidebands.) Shifts in the resonant cavity length also contribute to the linewidth and make it dependent on the measurement time. This indicates that the linewidth alone, or even a desirable spectral shape (lineform), cannot provide the full information about the laser spectrum.

Laser-a device capable of emitting laser light. The first microwave quantum amplifier was made in 1954, and a highly coherent microwave beam was obtained. In 1958, A.L. Xiaoluo and C.H. Towns extended the principle of microwave quantum amplifier to the optical frequency range. In 1960, T.H. Mayman and others made the first ruby laser. In 1961, A. Jia Wen and others made a helium-neon laser. In 1962, R.N. Hall and others created a gallium arsenide semiconductor laser. In the future, there will be more and more types of lasers. According to the working medium, lasers can be divided into four categories: gas lasers, solid lasers, semiconductor lasers and dye lasers. Free electron lasers have also been developed recently. High-power lasers are usually pulsed output.

Semiconductor laser diode, which can directly convert electrical energy into light energy, has the characteristics of high brightness, high efficiency, long life, small size, and direct modulation.