概括
研究人员开发了一种紧的三模 (去) 复合器,使用化上的槽波导多模干扰仪 (GW-MMI). 这一创新使光通信系统在较小的足迹中实现了高效的光操纵.
科学领域:
- 光子学是指光子学的使用方法.
- 集成光学 集成光学 集成光学
- 波导技术技术 波导技术
背景情况:
- 多模干扰仪 (MMI) 设备对于光学信号路由至关重要.
- 在集成光子学中,实现紧和高效的模式 (去) 复杂化仍然是一个挑战.
研究的目的:
- 为了展示一种新的紧型芯片上三模式 (de) 复合器.
- 为了提高性能,使用槽式波导多模干扰仪 (GW-MMI).
主要方法:
- 在化 (InP) 平台上制造GW-MMI合器.
- 将两个槽纳入MMI结构以限制自我形象.
- 使用传统的接触式光刻法制造波导.
主要成果:
- 显示出一个显著紧的MMI长度为198μm.
- 实现了2.9 dB (TE0),7.53 dB (TE1) 和4.05 dB (TE2) 的插入损失.
- 观察到3dB带宽超过13.5nm在1550nm所有模式.
结论:
- 该GW-MMI合器可以在InP.上首次演示一个紧的三模式 (de-) 复合器.
- 槽状结构增强了相位匹配,并减少了设备的长度.
- 制造过程简单且具有成本效益,适合集成光子应用.
相关概念视频
01:20Design Example: Capacitance Multiplier Circuit
962
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
962
01:22MOSFET: Enhancement Mode
478
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
478
01:24Bus Impedance Matrix
175
Calculating subtransient fault currents for three-phase faults in an N-bus power system involves using the positive-sequence network. When a three-phase short circuit occurs at a specific bus, the analysis uses the superposition method to evaluate two separate circuits.
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
175
01:20Inverting and Non-inverting OpAmps
948
In an inverting amplifier, the input voltage is connected through a resistor to the inverting terminal. Meanwhile, the non-inverting terminal is grounded and a feedback resistor is established between the inverting and output terminal, as depicted in Figure 1.
948
01:17MOSFET Amplifiers
222
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...
222
01:21Impedance Combination
504
Consider a string of christmas lights, each bulb symbolizing an impedance element. In this series configuration, the flow of electric current remains uniform across every component. This behavior aligns with Kirchhoff's Voltage Law (KVL), which asserts that the total impedance in such a setup equals the sum of individual impedances—akin to resistors in series. It follows that the voltage from the power source is distributed proportionally among these components, adhering to the...
504