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Tunable single-frequency erbium-doped optical fibre ring form cavity laser with stable output wavelength and power

An erbium-doped fiber and power stabilization technology, which is applied in the field of tunable single-frequency erbium-doped fiber ring cavity lasers, can solve the problems that the lasing wavelength and power of the laser are not stable enough, difficult to realize, and complex in structure, etc., and achieve low cost and device Simple, output spectrum stable effect

Inactive Publication Date: 2010-09-08
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

However, these methods are still not enough to stabilize the lasing wavelength and power of the laser, and the structure is complex and difficult to realize in practical applications, which makes the practical application of tunable single-frequency erbium-doped fiber ring cavity laser encounter great difficulties

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  • Tunable single-frequency erbium-doped optical fibre ring form cavity laser with stable output wavelength and power
  • Tunable single-frequency erbium-doped optical fibre ring form cavity laser with stable output wavelength and power

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Embodiment Construction

[0019] Please refer to Figure 1, a tunable single-frequency erbium-doped fiber ring cavity laser with stable output wavelength and power according to the present invention, which includes:

[0020] An erbium-doped fiber amplifier 1, the pump source in the erbium-doped fiber amplifier 1 is a high-power semiconductor laser with a wavelength of 980nm;

[0021] A polarization controller 2, the polarization controller 2 is connected to the erbium-doped fiber amplifier 1 with a single-mode fiber 7, and the polarization controller 2 is used to adjust the polarization state in the ring cavity of the laser;

[0022] A 1×2 optical coupler 5, the 1×2 optical coupler 5 is connected to the polarization controller 2 by a single-mode fiber 7;

[0023] A 2×2 optical coupler 6, the 2×2 optical coupler 6 is connected to the 1×2 optical coupler 5 with a single-mode fiber 7, and the other ends of the 2×2 optical coupler 6 are used Single-mode optical fibers 7 are connected to form a sub-ring cavity 11;

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Abstract

A tunable single-frequency erbium-doped fiber ring laser stable in output wavelength and power comprises an erbium-doped fiber amplifier, wherein, a polarization controller is connected with the erbium-doped fiber amplifier; a 1x2 optical coupler is connected with the polarization controller through single mode fiber; a 2x2 optical coupler is connected with the 1x2 optical coupler through single mode fiber; the heads and the tails of the other two ends of the 2*2 optical coupler are connected through single mode fiber; the 1x2 optical coupler is connected with the 2x2 optical coupler through single mode fiber; a filter is connected with the 1x2 optical coupler through single mode fiber; the other end of the filter is connected with the erbium-doped fiber amplifier, forming a main ring cavity; an adjustable laser is connected with the optical coupler by using an optical isolator through single mode fiber, and the adjustable laser is used to stabilize the output wavelength and power of the laser.

Description

Technical field [0001] The invention belongs to the technical field of optical fiber communication, and more specifically is a tunable single-frequency erbium-doped fiber ring cavity laser with stable output wavelength and power. Background technique [0002] Continuously operating erbium-doped fiber ring cavity laser (EDFRL) has simple structure, precise lasing wavelength, broadband tuning and narrow linewidth output; compared with other lasers, it has high gain, low threshold, and easy coupling with transmission fiber Many excellent characteristics can be widely used in optical communications, laser spectroscopy, optical fiber sensing and other fields. Although the linewidth of the erbium-doped fiber ring cavity laser is very narrow (can be less than 1kHz), because the fiber itself is easily affected by environmental factors such as vibration and temperature, it is very easy to jump without any mode locking and frequency selection measures. Therefore, the stability of center w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/35G02F1/39G02B6/26H01S3/00
Inventor 张欣祝宁华冯博学
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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