在 x-cut LNOI 带的波导放大器中以极化为依赖的增强特征
Jiayu Huang1,2, Run Li1,2, Suo Wang1
1Laboratory of Nano Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.
Nanophotonics (Berlin, Germany)
|December 22, 2025
概括
这项研究证明了在绝缘体上 (LNOI) 的x切割酸上使用辅助波导放大器 (EDWA) 的光学放大. 结果显示阿尔法极化性能优越,为集成光子设备铺平了道路.
科学领域:
- 光子学是指光子学的使用方法.
- 材料科学 材料科学 材料科学
- 光学工程是指光学工程.
背景情况:
- 用添加的波导放大器 (EDWA) 对于光子集成至关重要.
- 目前的EDWA主要使用z切割酸,与主流x切割平台不兼容.
- 这种不兼容性阻碍了大规模集成光子系统的发展.
研究的目的:
- 在绝缘体 (Er:LNOI) 上的X-cut Erbium-doped基酸盐中研究偏振依赖的光学增益.
- 理论分析和实验验证不同偏振的增强特征.
- 为了证明光学放大在x-cut LNOI平台上的可行性,用于先进的光子应用.
主要方法:
- 利用贾德-奥菲尔特理论分析了晶体方向对与Er3+离子的TE模式合的影响.
- 计算并比较了α (α) 和π (π) 两极化的过渡强度.
- 在1531nm和1550nm进行了吸收,排放截面和增强系数的实验测量.
主要成果:
- 贾德-奥菲尔特分析预测了α-和π-极化之间的过渡强度的显著差异.
- 实验结果证实α-极化在1531 nm时显示出1.8倍大的吸收和发射截面.
- 在1550nm,α极化实现增强系数为3.3dB/cm,而π极化为2.2dB/cm.
- 在α-极化放大器中,在小信号模式下显示了32.01dB的信号增强和11.18dB的内部净增益.
结论:
- 这项工作成功地证明了在x-cut LNOI平台上可行的光学放大.
- 这些发现突出了α-极化在这种材料系统中对光学增益的优越性能.
- 结果为使用x切 LNOI的大型光子和微波光子系统的开发提供了必要的支持.
相关概念视频
Small-Signal Analysis of MOSFET Amplifiers
1.1K
In small-signal analysis, a MOSFET transistor amplifier acts as a linear amplifier when operating in its saturation region. The gate-to-source voltage (VGS) of the MOSFET is the sum of the DC biasing voltage and the small time-varying input signal. This combination sets up the operating point and modulates the drain current (ID) that flows from the drain to the source. When a small AC signal is superimposed on the DC bias voltage at the gate, the instantaneous drain current comprises three...
1.1K
Small-Signal Analysis of BJT Amplifiers
1.7K
Small signal analysis is a fundamental approach used in electronics to understand how a Bipolar Junction Transistor (BJT) amplifier processes signals. In the active region, the BJT is designed for linear amplification. The transistor's behavior under these conditions is governed by its instantaneous base-emitter voltage VBE, a sum of the DC bias VBE, and a small AC signal VBE, resulting in the collector current iC. Here, the collector current has a DC component and an AC component.
1.7K
Biasing of P-N Junction
1.7K
The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
1.7K
MOSFET Amplifiers
460
The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
460
Gain
352
Gain and phase shift are properties of linear circuits that describe the effect a circuit has on a sinusoidal input voltage or current. The circuit's behavior that contains reactive elements will depend on the frequency of the input sinusoid. As a result, it is observed that the gain and phase shift will all be frequency functions.
Gain:
Suppose Vin is the input and Vout is the output signal to a circuit.
Gain:
Suppose Vin is the input and Vout is the output signal to a circuit.
352
Nuclear Overhauser Enhancement (NOE)
1.3K
Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically bonded or involved in J-coupling. This phenomenon, called the nuclear Overhauser enhancement (NOE), results from through-space interactions between the nuclear spins. The NOE effect decreases with increasing internuclear distance and is generally not observed beyond 4 angstroms. In NOE, dipole-dipole interactions between neighboring spin-active...
1.3K


