第一台实用激光器是红宝石激光器,于1960年研制成功。它是一种固态激光器,使用合成红宝石晶体(掺铬氧化铝)作为增益介质。红宝石晶体由强大的氙灯闪光管进行光泵浦,使铬离子发生粒子数反转,从而产生波长为694.3纳米的深红色光束。

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第一台实用激光器是红宝石激光器,于1960年研制成功。它是一种固态激光器,使用合成红宝石晶体(掺铬氧化铝)作为增益介质。红宝石晶体由强大的氙灯闪光管进行光泵浦,使铬离子发生粒子数反转,从而产生波长为694.3纳米的深红色光束。
创新世界
The ruby laser operates on a three-level energy system. The flashlamp’s light excites the chromium ions ([latex]Cr^{3+}[/latex]) to a broad absorption band (the pump band). From there, they quickly decay non-radiatively to a metastable energy level. Because this metastable level has a relatively long lifetime (a few milliseconds), a large population of ions can accumulate there, creating a population inversion relative to the ground state. When lasing begins, the ions transition from this metastable level back to the ground state, emitting 694.3 nm photons. Because it is a three-level system where the lower laser level is the ground state, it requires very intense pumping to achieve population inversion, making it relatively inefficient. The output is typically a series of short pulses for as long as the flashlamp is active.
红宝石激光
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