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RGB laser generation from fiber MOP As coupled to external enhancement cavities

机译：光纤MOP与外部增强腔耦合产生RGB激光

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Red (631 nm), green (532 nm), and blue (448 ran) continuous-wave (CW) lasers have been developed by Evans & Sutherland (E&S). These multi-watt RGB lasers are used as light sources in E&S' laser projector (ESLP), which delivers ultrahigh-resolution content (8192 × 4096 pixels) to large-surface-area venues (e.g., planetariums, simulators, visualization centers, etc.). Efficient visible wavelength generation is obtained by coupling single-frequency near-infrared (NIR) beams into free-space enhancement cavities containing critically phase-matched lithium triborate (LBO) crystals. The NIR energy is produced by a master-oscillator-power-amplifier (MOPA) system which is fiber-based, thus yielding Gaussian beams which are near-ideal for efficient fundamental-to-harmonic conversion. Both polarization-maintaining (PM) fibers and non-PM fibers have been employed with non-PM fiber systems requiring polarization sensing and control. Green laser light is produced by a second-harmonic generation (SHG) process with a 1064 nm fundamental. Red laser light is produced by a sum-frequency mixing (SFM) process with 1064 nm and 1550 nm as fundamentals. Blue laser light is produced by an SFM process with 1064 nm and 775 nm as fundamentals, where 775 nm is first produced by an SHG process with a 1550 nm fundamental. All resulting visible lasers are single-axial-frequency with FWHM bandwidths less than 400 kHz, and are spatially pure with M~2 values less than 1.05. At least 18 W of CW optical power has been generated at all three visible wavelengths, with available NIR amplifier power as the primary limiting factor.
机译：Evans＆Sutherland（E＆S）开发了红色（631 nm），绿色（532 nm）和蓝色（448 ran）连续波（CW）激光器。这些多瓦RGB激光用作E＆S的激光投影仪（ESLP）的光源，该投影仪可将超高分辨率内容（8192×4096像素）提供给大面积场所（例如，天象馆，模拟器，可视化中心等） ）。通过将单频近红外（NIR）光束耦合到包含临界相匹配的三硼酸锂（LBO）晶体的自由空间增强腔中，可以获得有效的可见波长生成。 NIR能量是由基于光纤的主振荡器功率放大器（MOPA）系统产生的，因此产生的高斯光束几乎是理想的，可以有效地进行从基波到谐波的转换。保偏（PM）光纤和非PM光纤都已用于需要偏振感测和控制的非PM光纤系统。绿色激光是通过二次谐波（SHG）工艺产生的，其基波为1064 nm。红色激光是通过以1064 nm和1550 nm为基础的和频混合（SFM）工艺产生的。通过以1064 nm和775 nm为基础的SFM工艺产生蓝色激光，其中首先通过以1550 nm为基础的SHG工艺产生775 nm。所有产生的可见光激光器都是单轴频率，FWHM带宽小于400 kHz，并且在空间上纯净，M〜2值小于1.05。在所有三个可见波长处都产生了至少18 W的CW光功率，而可用的NIR放大器功率是主要限制因素。

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