Tunable narrow-linewidth array single-frequency fiber laser

Abstract

A single-frequency fiber laser in the form of a tunable narrow-linewidth array. The fiber laser comprises a semiconductor laser chip array portion (1), a tunable narrow-linewidth single-frequency fiber laser array portion, and a miniature short fiber power amplification portion. The fiber laser can simultaneously achieve output of array single-frequency fiber lasers with a laser wavelength channel spacing of 100 GHz, single-transverse mode power being larger than or equal to 100 mW, a signal to noise ratio being larger than or equal to 65 dB, and narrow-linewidth being smaller than or equal to 10 kHz. A tunable function of central wavelength or output ways of each narrow-linewidth single-frequency fiber laser output unit can be effectively achieved based on precise temperature control technologies and selective pumping source working control modes, and accordingly real-time and effective tuning of output wavelength coverage formed by single-frequency fiber lasers in the form of a narrow-linewidth array can be achieved. The fiber laser can be widely used for coherent light communication and an application field where high-precision sensing and detection are simultaneously carried out on a plurality of targets.

Description

technical field [0001] The invention relates to fiber lasers used in the fields of coherent optical communication, fiber optic sensing, and fiber optic remote sensing, in particular to a tunable narrow-linewidth array type single-frequency fiber laser. Background technique [0002] Narrow-linewidth single-frequency laser is an important direction for the development of fiber lasers. It has extremely narrow linewidth, low noise, and excellent coherence characteristics, and is widely used in coherent optical communications, long-distance and high-precision sensing, laser ranging and indication, and materials technology. Especially for coherent optical communication, it is generally required that the spectral linewidth of the laser light source is extremely narrow (the linewidth will directly determine the lowest bit error rate that can be achieved in the communication system and must be reduced as much as possible), high frequency stability, multi-wavelength or variable wavele...

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Problems solved by technology

In addition, in 2004, Alexander University of the United States and NP Photonics applied for a patent for a high-power narrow-linewidth single-frequency laser system [publication number: US 2004 / 0240508 A1], which is based on a microchip laser resonator structure, but the required single-frequency laser system The frequency laser does not have the characteristics of all-fiber, wavelength tunable and array

In 2011, IPG Corporation of the United States applied for a patent for a high-power narrow-linewidth fiber laser [Publication No.: US 7903696 B2]. Based on two ultra-short single-frequency resonators, low-power narrow-linewidth single-frequency laser signals are output, respectively, through ordinary erbium-doped Fiber amplifiers and high-power double-clad fiber amplifiers perform laser power amplification, but the required fiber lasers do not have wavelength tunable and array features

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