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For spectral synthesis technology, increasing the number of synthesized laser sub-beams is one of the important ways to increase the synthesis power. Expanding the spectral range of fiber lasers will help increase the number of spectral synthesis laser sub-beams and increase the spectral synthesis power [44-45]. At present, the commonly used spectrum synthesis range is 1050～1072 nm. Further expanding the wavelength range of narrow linewidth fiber lasers to 1030 nm is of great significance to the spectrum synthesis technology. Therefore, many research institutions have focused on short wavelength (wavelength less than 1040 nm) narrow line Wide fiber lasers were studied. This paper mainly studies the 1030 nm fiber laser, and extends the wavelength range of the spectrally synthesized laser sub-beam to 1030 nm.

The difference between fiber lasers and semiconductor lasers lies in the different dielectric materials used to emit laser light.

An EDFA is a fiber amplifier based on the erbium-doped fiber principle. It boasts advantages such as a wide wavelength range, high amplification gain, low noise, and high reliability. It is widely used in optical communication systems.

High-power lasers operating at 1 μm wavelength, including fiber lasers, diode pumped solid-state (DPSS) lasers, and direct-diode lasers, are increasingly deployed in highly automated manufacturing lines. They enable a wide range of materials processing applications such as welding, cutting, brazing, cladding, surface treating, bulk material heating, highly localized heating, and additive manufacturing. Optimal laser designs can be achieved with the proper selection of semiconductor lasers, specialized optics, and thermal-management solutions.

Randomly distributed feedback fiber laser based on Raman gain, its output spectrum has been confirmed to be wide and stable under different environmental conditions, and the lasing spectrum position and bandwidth of the half-open cavity DFB-RFL is the same as the added point feedback device The spectra are highly correlated. If the spectral characteristics of the point mirror (such as FBG) change with the external environment, the lasing spectrum of the fiber random laser will also change. Based on this principle, fiber random lasers can be used to realize ultra-long-distance point-sensing functions.

Some laser applications require the laser to have a very narrow linewidth, that is, a narrow spectrum. Narrow linewidth lasers refer to single-frequency lasers, that is, there is a resonant cavity mode in the laser value, and the phase noise is very low, so the spectral purity is very high. Typically such lasers have very low intensity noise.