论文标题
通过光学反馈阶段调整控制双波长激光发射
Control of dual-wavelength laser emission via optical feedback phase tuning
论文作者
论文摘要
我们提出并演示了一种基于相控制的光学反馈的双波长激光器的两个振幅之间的平衡技术。调整反馈腔长度以实现所需发射波长之间的相对相位移位，从而引入一个波长的增益增益，而另一波长则会遭受额外的损失。调整光学反馈阶段被证明是控制增益和损失的有效方法，因此选择一个或平衡两个发射波长的振幅。这个概念可以轻松地适应任何平台，波长范围和波长分离，以便可以为每种模式获得足够的载体耦合和增益。为了证明可行性并评估这种方法的性能，我们已经实施了两个具有不同光谱分离的双波长激光器以及单个的光学反馈循环，以在1550 nm左右发出的INP通用铸造平台上。电流相调节器用于调整反馈阶段。使用此单个控制参数，我们成功地实现了10 nm波长分离的灭绝比，最高为38.6 dB，对于1 nm波长的分离，最高可达49 dB。
We propose and demonstrate a technique to control the balance between the two amplitudes of a dual-wavelength laser based on a phase-controlled optical feedback. The feedback cavity length is adjusted to achieve a relative phase shift between the desired emission wavelengths, introducing a boost in gain for one wavelength while the other wavelength experiences additional losses. Tuning the optical feedback phase proves to be an effective way to control the gain and losses, and, thus, to select one or balance the amplitude of the two emission wavelengths. This concept can be easily adapted to any platform, wavelength range and wavelength separations providing that a sufficient carrier coupling and gain can be obtained for each mode. To demonstrate the feasibility and to evaluate the performance of this approach, we have implemented two dual-wavelength lasers with different spectral separations together with individual optical feedback loops onto a InP generic foundry platform emitting around 1550 nm. An electro-optical-phase-modulator is used to tune the feedback phase. With this single control parameter, we successfully achieved extinction ratios of up to 38.6 dB for a 10 nm wavelength separation and up to 49 dB for a 1 nm wavelength separation.
