A novel diode laser-based ignition technique for hybrid propulsion systems has been developed. In an effort to determine the physical ignition mechanism, a test series was conducted in an optically accessible, slab-burning combustion chamber. High-speed imaging of the ignition event has revealed that high-temperature carbon particles created during laser-induced flash pyrolysis of the solid fuel grain act as the carriers of ignition energy. Tests run on both charring and noncharring thermoplastic fuel candidates support this observation. In this paper, an initial theory of the ignition mechanism is developed; and supporting evidence collected from tests in both oxidizing (oxygen) and inert (nitrogen) flow environments is presented. Finally, a number of observations regarding the effects of oxidizer velocity and incident laser power on ignition delay are discussed.

已经开发出一种用于混合动力系统的基于二极管激光的新型点火技术。为了确定物理点火机理，在光学可及的，平板燃烧的燃烧室中进行了一系列测试。点火事件的高速成像显示，在固体燃料颗粒的激光诱导的快速热解过程中产生的高温碳颗粒充当点火能量的载体。对炭化和非炭化热塑性燃料候选物进行的测试均支持该观察结果。本文提出了点火机理的初步理论。并提供了在氧化（氧气）和惰性（氮气）流动环境中从测试中收集的支持证据。最后，