Widely separated optical parametric oscillation (OPO) in an integrated Kerr microresonator offers a compact, highly coherent, and low‐power laser source, accessing previously inaccessible frequencies. Yet, extending the sideband of OPO from telecom to beyond 2 µm is still challenged by competing nonlinear effects and reduced Q factors at these extended wavelengths. In this work, efficient signal‐idler separations reaching 99 THz (1250–2130 nm) are demonstrated with a modest 8.1 mW threshold power, leveraging the heightened nonlinearity of GeSbS chalcogenide glass in the integrated microresonators. By pioneering energy dissipation control via pulley couplers, competing nonlinear phenomena are effectively suppressed, enabling the first demonstration of a widely separated OPO (wOPO) in the anomalous dispersion regime. Moreover, the wOPO features a robust existence region across a variety of device geometries, resilient to microresonator width alterations of up to 300 nm. These findings underscore the potential of integrated microresonators to adeptly bridge the telecom band to the MIR spectrum, achieving this transition with minimal power and controlled nonlinearities, a promising avenue for contemporary integrated photonics platforms utilizing heterogeneously integrated pump lasers.

中文翻译：

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集成硫族化物微谐振器中宽范围可调 (1.2–2.1 µm) 光学参量振荡的能量耗散工程

集成克尔微谐振器中的宽分离光学参量振荡 (OPO) 提供了紧凑、高度相干和低功率的激光源，可访问以前无法访问的频率。然而，将 OPO 边带从电信扩展到 2 µm 以上仍然面临着非线性效应的挑战，并且降低了问这些扩展波长的因素。在这项工作中，利用集成微谐振器中GeSbS硫族化物玻璃的高度非线性，以适度的8.1 ​​mW阈值功率证明了有效的闲频信号分离达到99 THz（1250-2130 nm）。通过滑轮耦合器开创性的能量耗散控制，有效地抑制了竞争性非线性现象，从而首次在反常色散范围内演示了广泛分离的 OPO (wOPO)。此外，wOPO 在各种器件几何形状上都具有强大的存在区域，能够适应高达 300 nm 的微谐振器宽度变化。这些发现强调了集成微谐振器巧妙地将电信频段与中红外光谱连接起来的潜力，以最小的功率和受控的非线性实现这种过渡，这是利用异构集成泵浦激光器的当代集成光子平台的一个有前途的途径。