The invention discloses an er-doped optical fiber source and a near-Gaussian spectrum output generating method thereof. The method is specifically as follows: an er-doped optical fiber is divided into a plurality of sections and filters are connected between the sections of er-doped optical fibers; a pumping laser source, the wavelength of which is 980nm, is used to pump all the er-doped optical fibers; the filters filter 1530nm-waveband seed light generated by the sections of optical fibers and the 1530nm-waveband seed light is restricted from entering a next section of er-doped optical fiber for stimulated radiation amplification; and at last, near-Gaussian spectra, the average wavelength of which is 1550 wavebands, are output. Based on a gain modulation technology of cascade filtering, the er-doped optical fiber source obtains near-Gaussian spectrum output, and can also have higher output power and larger spectrum width at the same time.

Er-doped optical fiber source and near-Gaussian spectrum output generating method thereof

The invention relates to an Er /Yb -doped optical fiber light source for high-precision fiber-optic gyroscopes, which comprises a pump laser, a wavelength division multiplexer WDM, an Er /Yb -doped optical fiber, an optical fiber mirror, an optical fiber isolator, and an optical fiber filter. The advantage lies in that the problem that the Er-doped optical fiber power source is of low power due to the limited pump light absorption function of Er ions in the prior art is solved, and a broadband light source technical scheme based on an Er /Yb -doped optical fiber is put forward, namely, the Er /Yb -doped optical fiber light source for high-precision fiber-optic gyroscopes.

Er /Yb -doped optical fiber light source for high-precision fiber-optic gyroscopes

The invention discloses a linear cavity doped fiber laser device. The linear cavity doped fiber laser device comprises an adjustable filter (2), a first reflecting mirror (1), a power equalization filter (3), a doped fiber (4), a pumping signal combiner (5), a pump laser device (6), a coupler (7), a second reflecting mirror (8) and an isolator (9). The power equalization filter (3) is arranged at the front end of the doped fiber (4) or at the front end of the isolator (9) and used for conducting different power attenuation on lasers with different wavelengths and optimizing consistency of output power at all the wavelengths. Indexes of the attenuation spectra [Att1, Att2, ... and Attn] of the power equalization filter (3) at all the wavelengths satisfy the formula: [Att1, Att2, ... and Attn]=[P1, P2, ... and Pn]-[Pmin], wherein P1, P2, ... and Pn are laser device output power values every other 1-2 nm in the process of adjusting the operating wavelengths of the adjustable filter (2); Pmin is the minimum power value of P1, P2, ... and Pn. The linear cavity doped fiber laser device can achieve the optimum effect of consistency of the output power at different wavelengths.

Linear cavity doped fiber laser device

The invention discloses a linear cavity optical fiber laser device The linear cavity optical fiber laser device comprises an adjustable filter, a first average power distributor, an ordinary doping optical fiber, a second average power distributor, a first Faraday rotator and a second Faraday rotator The first average power distributor and the second average power distributor are distributed on the two sides of the ordinary doping optical fiber respectively The two ends of the first Faraday rotator are connected with a light splitting port of the first average power distributor and the adjustable filter respectively, and the other end of the adjustable filter is connected with the first average power distributor Two ports of the second Faraday rotator are connected with two light split ports of the second average power distributor respectively The difference between the rotating angle of the first Faraday rotator and the rotating angle of the second Faraday rotator is 45 degrees According to the linear cavity optical fiber laser device, the power and the polarization state of the laser output by the linear cavity optical fiber laser device are distributed in a circular symmetry mode through the deflection rotation of the two Faraday rotators The linear cavity optical fiber laser device has the advantages that cost is low, integration is convenient, and batched usage is facilitated

Linear cavity optical fiber laser

The invention relates to a rare earth doping optical fiber light source light path structure. Assemblies of the rare earth doping optical fiber source light path structure comprise a Faraday rotation reflector (1), an optical filter (2), a rare earth doping optical fiber, a pumping signal combiner (4), a pumping laser (5), an isolator (6) and an attenuator (7). One of connecting modes among the assemblies comprises the optical filter (2) is respectively connected with the Faraday rotation reflector (1) and the rare earth doping optical fiber (3), the other end of the rare earth doping optical fiber (3) is connected with a common end of the pumping signal combiner (4), a pumping end of the pumping signal combiner (4) is connected with the pumping laser (5), a transmission end of the pumping signal combiner (4) is connected with an input end of the isolator (6), and an output end of the isolator (6) is connected with an input end of the attenuator (7). The rare earth doping optical fiber light source light path structure can ensure the fact that shapes of light source spectrums of different output power grades are kept unchanged under the condition that the same type of an optical filter is used in a rare earth doping optical fiber light source, and therefore cost is reduced.

Yu Chunping

Papers

Rare earth doping optical fiber light source light path structure