CN114389704A - 一种基于mzi-mrr结构的微波光子滤波器 - Google Patents
一种基于mzi-mrr结构的微波光子滤波器 Download PDFInfo
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Abstract
本发明公开了一种基于MZI‑MRR结构的微波光子滤波器,属于微波滤波器技术领域,包括激光器、MZI‑MRR结构和光电探测器,所述激光器用于产生连续的激光信号,所述MZI‑MRR结构用于接收所述激光信号及待滤波的射频信号,并将所述射频信号与所述激光信号以90°相位差射频混合,得到混合后光谱,所述MZI‑MRR结构还用于对所述混合后光谱进行滤波,得到滤波后光谱,所述光电探测器用于将所述滤波后光谱转换为射频滤波响应;本发明的微波光子滤波器具有插拔小、抑制比大和带宽窄的优点。
Description
技术领域
本发明涉及一种基于MZI-MRR结构的微波光子滤波器,属于微波滤波器技术领域。
背景技术
微波滤波器被广泛应用在无线通信、卫星通信、电子雷达等现代微波系统中,用于挑选出目标频段的有用信号和滤除其他频段较大的噪声信号。传统的电滤波微波滤波器受电子瓶颈所限,工作带宽窄,可调谐性差,体积大,难以满足高速通信时代的高频段和高通信容量的要求。
微波光子滤波器将信号从微波域转变到光域,然后将光信号进行滤波,再用光电探测器实现光电转换。相比较传统的电子滤波器,微波光子滤波器具有带宽高、调谐性好、抗电磁干扰性好、可重构等显著优势。但早期的微波光子滤波器还停留在分立元件时代,各个器件之间依靠光纤进行连接,仍存在系统体积和重量大、功率和成本高、稳定性差等问题。
微波光子滤波器进入光子集成时代后,为了解决上述问题,人们在不同方案上进行了大量探索,衍生出集成微波光子滤波器这一新兴方向。
发明内容
本发明提供了一种基于MZI-MRR结构的微波光子滤波器,具有插拔小、抑制比大和带宽窄的特点。
本发明提供了一种基于MZI-MRR结构的微波光子滤波器,包括激光器、MZI-MRR结构和光电探测器;
所述激光器用于产生连续的激光信号;
所述MZI-MRR结构用于接收所述激光信号及待滤波的射频信号,并将所述射频信号与所述激光信号以90°相位差射频混合,得到混合后光谱;
所述MZI-MRR结构还用于对所述混合后光谱进行滤波,得到滤波后光谱;
所述光电探测器用于将所述滤波后光谱转换为射频滤波响应。
可选的,所述MZI-MRR结构包括MZI臂、微环及直波导;
所述MZI臂与所述直波导相对设置,所述微环位于所述MZI臂与所述直波导之间;
所述MZI臂包括信号载入部分和连接在所述信号载入部分两端的两个信号传输耦合部分,所述信号载入部分具有弯折结构;
所述信号载入部分用于载入所述射频信号,并将所述射频信号转变为电信号;
所述信号传输耦合部分的弯折结构与所述直波导、所述微环之间产生耦合。
可选的,所述信号载入部分由热光材料或光电材料制成。
可选的,所述信号载入部分为微加热器。
可选的,所述信号传输耦合部分、所述微环及所述直波导均由硅材料制成。
可选的,所述微波光子滤波器还包括SOI衬底,所述MZI-MRR结构设置在所述SOI衬底上。
可选的,所述激光器为InP半导体激光器。
可选的,所述光电探测器为光电二极管。
本发明能产生的有益效果包括:
本发明的微波光子滤波器以SOI为衬底,基于MZI-MRR结构,通过热调制或电调制方式调制射频信号的载入方式,使滤波器输出的射频滤波响应满足不同的滤波需求;滤波器插入损耗<<1.5db,抑制比大于40db,带宽约200MHz,以实现插损更小、抑制比更大、带宽更窄且能用于5G通信的滤波芯片。
附图说明
图1为本发明实施例提供的一种基于MZI-MRR结构的微波光子滤波器的原理图;
图2为图1中MZI-MRR结构示意图。
部件和附图标记列表:
1、激光器;2、MZI-MRR结构;21、MZI臂;211、信号载入部分;212、信号传输耦合部分;22、微环;23、直波导;3、光电探测器;4、SOI衬底。
具体实施方式
下面结合实施例详述本发明,但本发明并不局限于这些实施例。
如图1、图2所示,本发明实施例提供了一种基于MZI-MRR结构的微波光子滤波器,包括激光器1、MZI-MRR结构2、光电探测器3和SOI衬底4。
激光器1用于产生连续的激光信号,并将激光信号输入到MZI-MRR结构2,所述激光器1为芯片级激光器。本实施例中,激光器1为InP半导体激光器。
MZI-MRR结构2用于接收激光信号及待滤波的射频信号,并将射频信号与激光信号以90°相位差射频混合,得到混合后光谱;MZI-MRR结构2还用于对混合后光谱进行滤波,得到滤波后光谱。
具体的,MZI-MRR结构2包括MZI臂21、微环22及直波导23。
MZI臂21与直波导23相对设置,微环22位于MZI臂21与直波导23之间。
MZI臂21包括信号载入部分211和连接在信号载入部分211两端的两个信号传输耦合部分212,信号载入部分211具有弯折结构,本实施例中信号载入部分211和信号传输耦合部分212一体成型。
信号载入部分211用于载入射频信号,并将射频信号转变为电信号。
信号传输耦合部分212的弯折结构与直波导23、微环22之间产生耦合。
具体的,信号传输耦合部分212、微环22及直波导23均由硅材料制成,信号载入部分211由热光材料或光电材料制成,本实施例中,信号载入部分211为微加热器。
通过电调制器调整信号载入部分211的折射率,以改变信号传输耦合部分212的弯折结构与直波导23、微环22之间的耦合系数,从而改变射频信号的载入方式,实现等效相位调制或非对称双带调制,使得本发明的微波光子滤波器可以在带通和带阻之间切换滤波响应。
光电探测器3用于将滤波后光谱转换为射频滤波响应,本实施例中光电探测器3为光电二极管。
MZI-MRR结构2设置在SOI衬底4上。
本发明的微波光子滤波器以SOI为衬底,基于MZI-MRR结构2,通过热调制或电调制方式调制射频信号的载入方式,使滤波器输出的射频滤波响应满足不同的滤波需求;滤波器插入损耗<<1.5db,抑制比大于40db,带宽约200MHz,以实现插损更小、抑制比更大、带宽更窄且能用于5G通信的滤波芯片
以上,仅是本申请的几个实施例,并非对本申请做任何形式的限制,虽然本申请以较佳实施例揭示如上,然而并非用以限制本申请,任何熟悉本专业的技术人员,在不脱离本申请技术方案的范围内,利用上述揭示的技术内容做出些许的变动或修饰均等同于等效实施案例,均属于技术方案范围内。
Claims (8)
1.一种基于MZI-MRR结构的微波光子滤波器,其特征在于,包括激光器、MZI-MRR结构和光电探测器;
所述激光器用于产生连续的激光信号;
所述MZI-MRR结构用于接收所述激光信号及待滤波的射频信号,并将所述射频信号与所述激光信号以90°相位差射频混合,得到混合后光谱;
所述MZI-MRR结构还用于对所述混合后光谱进行滤波,得到滤波后光谱;
所述光电探测器用于将所述滤波后光谱转换为射频滤波响应。
2.根据权利要求1所述的微波光子滤波器,其特征在于,所述MZI-MRR结构包括MZI臂、微环及直波导;
所述MZI臂与所述直波导相对设置,所述微环位于所述MZI臂与所述直波导之间;
所述MZI臂包括信号载入部分和连接在所述信号载入部分两端的两个信号传输耦合部分,所述信号载入部分具有弯折结构;
所述信号载入部分用于载入所述射频信号,并将所述射频信号转变为电信号;
所述信号传输耦合部分的弯折结构与所述直波导、所述微环之间产生耦合。
3.根据权利要求2所述的微波光子滤波器,其特征在于,所述信号载入部分由热光材料或光电材料制成。
4.根据权利要求3所述的微波光子滤波器,其特征在于,所述信号载入部分为微加热器。
5.根据权利要求2所述的微波光子滤波器,其特征在于,所述信号传输耦合部分、所述微环及所述直波导均由硅材料制成。
6.根据权利要求1所述的微波光子滤波器,其特征在于,所述微波光子滤波器还包括SOI衬底,所述MZI-MRR结构设置在所述SOI衬底上。
7.根据权利要求1所述的微波光子滤波器,其特征在于,所述激光器为InP半导体激光器。
8.根据权利要求1所述的微波光子滤波器,其特征在于,所述光电探测器为光电二极管。
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US20200409229A1 (en) * | 2019-06-28 | 2020-12-31 | Morton Photonics | Linearized mach zehnder interferometer (mzi) modulator |
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CN113691315A (zh) * | 2021-08-24 | 2021-11-23 | 华中科技大学 | 一种可重构的集成微波光子带通滤波器 |
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CN114626011A (zh) * | 2022-05-12 | 2022-06-14 | 飞诺门阵(北京)科技有限公司 | 光子计算神经网络运算加速方法、装置、设备及存储介质 |
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