1578nm 10mW DFB Butterfly Laser Diode Manufacturers

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.

As a core driving force in the field of industrial manufacturing, laser technology itself is constantly moving forward. In summary, lasers are developing in the four major directions of "faster, higher, better, and shorter".

Photodiodes are often used as photodetectors. Such devices contain a p-n junction and usually have an intrinsic layer between the n and p layers. Devices with intrinsic layers are called PIN-type photodiodes. The depletion layer or the intrinsic layer absorbs light and generates electron-hole pairs, which contribute to the photocurrent. Over a wide power range, the photocurrent is strictly proportional to the absorbed light intensity.

The near-infrared spectrum is mainly generated when the molecular vibration transitions from the ground state to a high energy level due to the non-resonant nature of the molecular vibration. What is recorded is mainly the frequency doubling and combined frequency absorption of the vibration of the hydrogen-containing group X-H (X=C, N, O). . Different groups (such as methyl, methylene, benzene rings, etc.) or the same group have obvious differences in the near-infrared absorption wavelength and intensity in different chemical environments.

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.

Fiber lasers refer to lasers that use rare-earth-doped glass fibers as gain media. Fiber lasers can be developed on the basis of fiber amplifiers: high power density is easily formed in the fiber under the action of pump light, resulting in laser working material. The energy level "number inversion" can form laser oscillation output when a positive feedback loop (form a resonant cavity) is properly added.