A full solid-state mode-locked laser dual optical comb generating device

By utilizing a near-confocal cavity design with a lens group and birefringent crystal, the instability and high cost of existing devices in the all-solid-state mode-locked laser dual-comb generator are solved, achieving compact and efficient dual-comb generation that is suitable for use outside the laboratory.

CN115528525BActive Publication Date: 2026-07-17NORTHWEST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHWEST UNIV
Filing Date
2022-10-12
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In the existing technology, the dual-comb generation method requires a complex circuit feedback system, which leads to unstable devices, high costs, large size, and inability to achieve a wide range of tunability and locking of the repetition frequency difference, making it difficult to use outside the laboratory.

Method used

The all-solid-state mode-locked laser dual-comb generator uses a near-confocal cavity design composed of components such as a lens group, dichroic mirror, gain crystal, birefringent crystal, and semiconductor saturable absorber mirror. It utilizes a wedge-shaped birefringent crystal to achieve a wide range of tuning and locking of the repetition frequency difference, thereby generating a dual-frequency comb with high mutual coherence.

Benefits of technology

It achieves compactness and ease of operation, improves the power of output laser and optical-to-optical conversion efficiency, and can generate highly coherent dual optical combs, making it suitable for use outside the laboratory.

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Abstract

The application provides a full solid-state mode-locked laser double optical comb generating device, and relates to the technical field of optical frequency, and comprises a lens group (1), a dichroic mirror (2), a gain crystal (3), a first birefringent crystal (4), a second birefringent crystal (5) and a semiconductor saturable absorber mirror (6), wherein the pump source generates pump light which passes through the lens group (1) to converge a light spot, and passes through the dichroic mirror (2) and is connected with the gain crystal (3), the front and back sides of the gain crystal (3) are connected with the first birefringent crystal (4) and the second birefringent crystal (5) through optical connection respectively, and the second birefringent crystal (5) is connected with the semiconductor saturable absorber mirror (6); the pump light is divided into two polarized lights which are orthogonal to each other by the birefringent crystal, and the gain medium is directly pumped, so that the full solid-state mode-locked laser double optical comb with compact structure, large range of repetition frequency difference tuning and high mutual coherence is realized.
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