Enhancement type fiber-optical laser for resonant cavity pump

Abstract

The invention provides a cavity resonator pump enhanced type fiber laser, pertaining to the technical field of fiber laser. The cavity resonator pump enhanced type fiber laser comprises a pumping source and a cavity resonator connected with the pumping source and is characterized in that the cavity resonator consists of a cavity resonator doped fiber and two silica fibers carved with two fiber gratings, the two silica fibers are connected to two ends of the cavity resonator doped fiber by connectors respectively in a connection mode of mechanical alignment, wherein the cavity resonator doped fiber and a fiber grating at the proximal end in the two silica fibers form an internal cavity resonator pumping enhanced module; one end of the cavity resonator is connected with the pumping source and the other end is connected with a wavelength division multiplex (WDM) coupler; light emitted from the pumping source enters the cavity resonator by the silica fiber at one side and is vibrated, amplified and enhanced by the cavity resonator and the internal cavity resonator pumping enhanced module to generate laser which is output through one end of the wavelength division multiplex coupler. The cavity resonator pump enhanced type fiber laser fulfills the purposes of high gain, high power and high signal to noise ratio.

Description

(1) Technical field [0001] The invention relates to a resonant cavity pumping enhanced fiber laser, which belongs to the technical field of fiber lasers. (2) Background technology [0002] With the development of optical communication technology and its application in various sectors of the national economy, the requirements for signal sources in optical fiber communication technology are getting higher and higher. Now the research and citations in the field of optical communication mainly focus on three wavebands: S-band (about 1480-1530nm), C-band (about 1530-1565nm), and L-band (about 1570-1610nm). The birth of fiber laser, with its lower manufacturing cost, more output wavelength, higher tunability and very high electro-optical efficiency, has greatly promoted the development of fiber optic communication. At present, most of the fiber lasers use semiconductor lasers as the pump source, but the output wavelengths of semiconductor lasers are small, which cannot meet the r...

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Problems solved by technology

However, this method achieves pumping by introducing a fiber laser. There is inevitably a connection loss between the two resonators. The output energy of the first-stage fiber laser is low, which is limited by the first-stage resonator. Limiting the optical gain cannot be done too much, the pump efficiency is relatively low, and the beam quality is relatively poor

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