In this work, we present the design and performance of a monolithic master oscillator tilted tapered power amplifier emitting at 1060 nm. The device consists of three sections: a 2 mm long ridge waveguide (RW) master oscillator (MO) section with two surface distributed Bragg reflection (DBR) mirrors, a 0.5 mm long bent RW control (CON) section and a 3.5 mm long tapered power amplifier (TTPA) section tilted by 4°. With this design, unwanted back reflection from the front facet of the device towards the MO can be suppressed and the injection of the emitted light from the MO in the TTPA can be controlled by the applied current to the CON section. The device reaches an optical output power of up to 9.5 W. The emitted spectra are mode jump free over a wide power range having a spectrally narrow emission of $\Delta \lambda < 20$ pm. By adjusting the control current an optimal driving condition of the device can be found with high output power, narrow spectral bandwidth and a nearly diffraction-limited beam quality factor (1/e²) $M^{2} < 1.5$ .

中文翻译：

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单片主振荡器倾斜锥形功率放大器在 1060 nm 发射 9.5 W

在这项工作中，我们展示了单片主振荡器倾斜锥形功率放大器的设计和性能，其发射波长为 1060 nm。该设备由三个部分组成：一个 2 毫米长的脊形波导 (RW) 主振荡器 (MO) 部分，带有两个表面分布式布拉格反射 (DBR) 反射镜，一个 0.5 毫米长的弯曲 RW 控制 (CON) 部分和一个 3.5 毫米长的锥形功率放大器 (TTPA) 部分倾斜 4°。通过这种设计，可以抑制从器件正面朝向 MO 的不需要的背反射，并且可以通过施加到 CON 部分的电流来控制从 MO 发射的光在 TTPA 中的注入。该器件的光输出功率高达 9.5 W。 发射光谱在宽功率范围内无模式跳跃，光谱窄发射 $\Delta \lambda < 20$ 下午。通过调整控制电流，可以找到具有高输出功率、窄光谱带宽和几乎受衍射限制的光束质量因子 (1/e ² )的器件的最佳驱动条件 $M^{2} < 1.5$ .