Modulation-free frequency stabilizer of external cavity semiconductor laser

A semiconductor and laser technology, applied in the field of non-modulation frequency stabilization devices, can solve problems such as strong magnetic fields, sensitivity to external influences, and complex structures

Active Publication Date: 2009-09-09
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

[0010] The present invention proposes an external cavity semiconductor laser in order to solve the disadvantages of the above-mentioned prior art in the non-modulation frequency stabilization structure of the commonly used single-frequency narrow-linewidth external cavity semiconduct

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  • Modulation-free frequency stabilizer of external cavity semiconductor laser
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  • Modulation-free frequency stabilizer of external cavity semiconductor laser

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention should not be limited thereto.

[0019] see first figure 1 , as can be seen from the figure, the present invention is based on the non-modulation frequency stabilization device of the single-frequency narrow-linewidth external-cavity semiconductor laser of the Sagnac ring, including a single-frequency narrow-linewidth external-cavity semiconductor laser 1, in which the external-cavity semiconductor laser 1 The forward direction of the output light is provided with Faraday isolator 2, half-wave plate 3 and polarizing beam splitter 4 in sequence. As a frequency-stabilized light, there is a Sagnac ring in the direction of the reflected light. This Sagnac ring is composed of the first beam splitter 5, the reference gas chamber 6, the total reflection mirror 7, and the internal total reflection triangular prism 8 connected i...

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Abstract

A modulation-free frequency stabilizer of an external cavity semiconductor laser consists of a single frequency narrow-linewidth external-cavity semiconductor laser, a Faraday isolator, a first half-wave plate, a polarization beam splitter, a Sagnac ring, a differential detection circuit consisting of two photoelectric diode detectors, a subtraction circuit, a proportional-integral-differential processing circuit and a switch. The modulation-free frequency stabilizer has the advantages of simple structure, good frequency stabilization effect, low cost and the like.

Description

technical field [0001] The invention relates to a semiconductor laser, in particular to a non-modulation frequency stabilization device for an external cavity semiconductor laser. The device is mainly used in the fields of laser atom cooling, high-resolution laser spectrum, laser frequency standard, optical measurement and the like. Background technique [0002] In recent years, semiconductor laser technology has developed rapidly, the performance of semiconductor lasers has been continuously improved, and their applications have become more and more extensive. Due to its various advantages such as miniaturization and easy operation, most of the single-frequency narrow-linewidth lasers required in applications such as laser cooling, laser frequency standards, high-resolution laser spectroscopy, and high-precision interferometry currently use semiconductor lasers. Laser cooling and laser spectroscopy have high requirements on the linewidth and frequency stability of the laser...

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Application Information

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IPC IPC(8): G02F1/35H01S5/14G01J1/42
Inventor 陈迪俊方祖捷魏芳蔡海文瞿荣辉
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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