【摘要】 啁啾脉冲放大（CPA）技术为超快超强激光的产生提供了革命性的技术路径，助推了激光脉冲的峰值功率从吉瓦量级到太瓦量级的突破。双啁啾光参量放大（DC-OPA）是从CPA技术衍生而来的一种产生超快超强激光的技术，具有超宽带增益特性与独特的双啁啾配置。相较于传统的CPA技术以及光参量啁啾脉冲放大（OPCPA）技术，DC-OPA技术能实现更加宽带、高效的增益，是实现高功率少（单）光学周期红外激光的核心技术之一。对DC-OPA技术展开了系统的研究介绍，从技术原理与技术方案出发，总结相关的研究成果，并对未来的发展方向进行展望。更多还原

【Abstract】 Significance The advancement of ultrafast and ultra-intense lasers, which deliver femtosecond-scale pulse widths and terawatt-level peak powers, has been a driving force behind groundbreaking research in areas such as attosecond science and strong-field physics. A pivotal innovation in this field is the chirped pulse amplification(CPA) technique, which effectively overcomes nonlinear effects and material damage thresholds during laser amplification. However, the gain bandwidth of CPA is inherently limited by the laser gain medium, restricting its ability to generate laser pulses approaching the single-optical-cycle regime. Such extremely short pulses are highly sought-after for their ability to probe and control electron dynamics on an attosecond timescale. Optical parametric amplification(OPA) and its derivative, optical parametric chirped pulse amplification(OPCPA), offer broader gain bandwidths. Nevertheless, OPCPA faces a fundamental trade-off between gain bandwidth and conversion efficiency. It is against this backdrop that dual-chirped optical parametric amplification(DC-OPA) was conceived. By introducing matched chirps to both the pump and seed pulses, DC-OPA is designed to systematically overcome this limitation, simultaneously enabling ultra-broadband gain and high conversion efficiency, which makes it a core technology for generating high-power, single-cycle infrared laser pulses.Progress The core innovation of DC-OPA lies in its dual-chirp configuration, which enables superior temporal and spectral synchronization between the pump and seed pulses. This design dramatically enhances the gain bandwidth and conversion efficiency compared to its predecessor, OPCPA, by meticulously maintaining phase-matching across a broad spectrum. The principle hinges on the critical concept of chirp matching, where the chirp characteristics of the pump and seed must align with the crystal’s phasematching trajectory for optimal performance(Fig. 2). This fundamental flexibility allows a single DC-OPA system, using a crystal like BBO, to be configured for efficient amplification across distinctly different spectral bands, such as 1200-1700 nm or 1700-2200 nm, simply by adjusting the chirp signs of the pump and seed pulses(Fig. 3).A typical DC-OPA system is architected around three key modules: seed generation, parametric amplification, and dispersion management(Fig. 4). The pursuit of high-energy, few-cycle pulses has driven significant progress in each area. For seed generation, intra-pulse difference frequency generation is often preferred for its ability to deliver octave-spanning mid-infrared spectra with passive carrier-envelope phase stability. The amplification stage typically employs a multi-stage design using crystals like BBO, BiBO, and MgO∶LN to progressively boost energy while managing gain narrowing and superfluorescence. Dispersion control is paramount, with devices like acousto-optic programmable dispersive filters(AOPDFs) enabling precise chirp management for subsequent compression to the few-cycle regime.The evolution of DC-OPA is clearly reflected in its performance milestones. Systems based on this technology have consistently pushed the boundaries, achieving multi-terawatt peak powers and pulse durations down to 1.8 optical cycles. A comparative analysis of various mid-infrared laser technologies clearly shows DC-OPA’s dominant position in the high-energy, short-pulse-width parameter space(Fig. 7). A landmark recent advancement is the “Advanced DC-OPA” scheme. This approach actively designs the chirp matching to seamlessly combine the gain bands of different nonlinear crystals(e.g., BiBO and MgO∶LN), effectively breaking the bandwidth limit of a single crystal. This innovation has enabled the generation of 6 TW, single-cycle(8.58 fs at 2.44 μm) infrared laser pulses, establishing a new performance benchmark and highlighting its immense potential as a driver for attosecond science.Conclusions and Prospects DC-OPA has established itself as a pivotal technology for generating ultra-intense, few-cycle infrared laser pulses. Its core principle of dual-chirp management effectively overcomes the bandwidth-efficiency trade-off of traditional parametric amplifiers. The recent “Advanced DC-OPA” concept, by synergistically combining multiple crystals, breaks the gain bandwidth limit of a single crystal, enabling the generation of high-energy single-cycle pulses. Future efforts should focus on enhancing the stability and robustness of DC-OPA systems for deployment in large-scale scientific facilities. Furthermore, leveraging its flexible chirp management and extending this technology to longer wavelengths(e. g., long-wave infrared above 10 μm) hold promise for opening new frontiers in molecular fingerprint spectroscopy and strong-field physics.更多还原