本文關(guān)鍵詞：基于共振耦合光子晶體多波長(zhǎng)THz濾波器的研究　出處：《南京郵電大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 共振耦合 光子晶體 THz波 環(huán)形腔 濾波器

【摘要】：太赫茲波是頻率范圍為0.1-10THz的電磁波,它是很好的寬帶信息載體,由于所處的特殊頻段,它的方向性和穿透性在通信方面具有很大的潛力。光子晶體具有光子禁帶和光子局域等特點(diǎn),將光子晶體技術(shù)用于制作THz通信的關(guān)鍵器件THz濾波器具有重要意義。本文將光子晶體技術(shù)和THz技術(shù)相結(jié)合,提出一種基于共振耦合的光子晶體多波長(zhǎng)THz濾波器。首先分析了基于共振耦合光子晶體THz波濾波器的基本原理,然后在此基礎(chǔ)上設(shè)計(jì)了直波導(dǎo)和環(huán)形腔相結(jié)合的簡(jiǎn)單正方晶格光子晶體結(jié)構(gòu),接著,分析環(huán)形腔的不同結(jié)構(gòu)對(duì)濾波器性能的影響。通過(guò)改變內(nèi)部介質(zhì)柱半徑及其折射率,改變散射介質(zhì)柱的半徑等等,對(duì)不同波長(zhǎng)的THz波進(jìn)行濾波。經(jīng)過(guò)優(yōu)化,得到一種4×3內(nèi)部介質(zhì)柱,帶有四個(gè)散射介質(zhì)柱的光子晶體環(huán)形腔濾波器。最后,利用RSoft軟件仿真分析了不同波長(zhǎng)的THz信號(hào)入射時(shí),濾波器的性能指標(biāo)。仿真結(jié)果表明,簡(jiǎn)單正方晶格光子晶體的光子帶隙寬度較大,對(duì)應(yīng)的波長(zhǎng)范圍在65.265~88.613μm。該基于共振耦合的光子晶體多波長(zhǎng)THz濾波器可以實(shí)現(xiàn)四個(gè)波長(zhǎng)分別為82.086μm(頻率為3.654THz)、83.168μm(頻率為3.607THz)、84.457μm(頻率為3.552THz)和85.601μm(頻率為3.505THz)的窄帶濾波,相應(yīng)的頻帶寬度為:0.0017THz、0.0009THz、0.0016THz和0.0013THz。該濾波器的濾波效率幾乎接近100%、插入損耗低于0.1dB,信道隔離度接近20dB,響應(yīng)時(shí)間在2ns左右,濾波性能優(yōu)良。該濾波器在未來(lái)的多波長(zhǎng)THz通信領(lǐng)域中具有廣泛的應(yīng)用前景。
[Abstract]:The terahertz frequency range of 0.1-10THz electromagnetic wave, it is broadband information carrier is very good, because of the special frequency band, its direction and penetration has great potential in communication. The photonic crystal has a photonic band and photonic localization features, Guang Zijing technology has important significance for the key devices in THz filter THz communication. The photonic crystal technology combined with THz technology and proposes a photonic crystal resonant coupling multi wavelength filter based on THz. Firstly analyzes the basic principle of resonance coupling of photonic crystal THz wave filter based on, and then on the basis of the design of the combination of straight waveguide and ring resonator simple lattice photonic Affirmative the crystal structure, then the analysis of the influence of different structure of the ring cavity on the filter performance. By changing the internal dielectric radius and refractive index change, scattering medium column The radius and so on, to filter the THz wave with different wavelength. After optimization, a 4 * 3 medium inside the column, with four scattering medium column photonic crystal ring resonator filter. Finally, using RSoft software simulation of the THz signal in different incident wavelength, the performance of the filter. The simulation results show that the a simple Affirmative photonic lattice photonic crystal band gap width is larger, the corresponding wavelength in the range of 65.265~88.613 ~ M. of the photonic crystal resonant coupling multi wavelength THz filter can achieve four wavelengths were 82.086 m (based on the frequency of 3.654THz), 83.168 m (3.607THz), 84.457 m (3.552THz) and 85.601 M (frequency 3.505THz) narrowband filter, the frequency band width: 0.0017THz, 0.0009THz, 0.0016THz and 0.0013THz. filtering efficiency of the filter is nearly 100%, the insertion loss is less than 0.1dB, channel isolation It is close to 20dB, the response time is around 2ns, and the filtering performance is excellent. The filter has a wide application prospect in the future multi wavelength THz communication field.

【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN713;O734

【共引文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前4條

1 單春霞;復(fù)合晶體的熱特性及實(shí)驗(yàn)研究[D];山東師范大學(xué);2011年

2 方敏;N_2O和N_2輝光放電的中紅外激光光譜研究[D];華中師范大學(xué);2011年

3 戈曉恒;基于組合諧振腔THz雙波長(zhǎng)濾波器的設(shè)計(jì)和性能分析[D];南京郵電大學(xué);2014年

4 孫會(huì);基于三重晶格光子晶體三波長(zhǎng)THz濾波器的設(shè)計(jì)與性能分析[D];南京郵電大學(xué);2014年

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本文編號(hào)：1395202