Tunable narrow-linewidth array single-frequency fiber laser

Abstract

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

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. [0002] Background technique [0003] 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 varia...

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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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