Tunable wavelength filters using polymer long-period waveguide gratings based on metal-cladding directly defined technique

In this work, a dual-side parabolic structural (DSPS) multimode interference (MMI) thermo-optic (TO) waveguide switch is designed and fabricated by using novel low-loss fluorinated photopolymer materials. Comparing with the traditional dual-side linear structural (DSLS) MMI device, the effective length of the MMI coupling region proposed can be effectively reduced by 40%. The thermal stability of the waveguide material is analyzed, and the optical characteristics of the switching chip are simulated. The actual performances of the entire MMI switch are measured with an insertion loss of 7 dB, switching power of 15 mW and an extinction ratio of 28 dB. In contrast to the traditional MMI optical switch, the new type of parabolic structural MMI TO waveguide switch exhibits lower power consumption and larger extinction ratio. The compact fluorinated polymer MMI TO switches are suitable well for realizing miniaturization, high-properties, and lower cost of photonic integrated circuits.

“…9, similar to those in Refs. [29] and [30] The resistance of the Al electrode heater is measured to be 200 Ω. The profiles of MMI waveguide and electrode heater are given in Figs.…”

Section: Fabrication and Measurement Of Dsps MMI To Switchmentioning

confidence: 99%

Compact 2×2 parabolic multimode interference thermo–optic switches based on fluorinated photopolymer

Wang¹,

Chen²,

Ke-wei³

et al. 2019

“…The inorganic waveguide sensors are highly sensitive due to their inherently high refractive index deviations, while polymer waveguide sensors have the advantages of low cost, and easy modification as necessary; they are also very useful in sensing applications that require portability and disposability. [1] Polymer optical waveguide sensors have several main structures such as surface plasma resonance (SPR) structures, [2][3][4][5][6] grating structures, [7,8] micro-ring structures, and MZI structures. The SPR structure comprises a commercial chemical detection system based on prism-coupling technology.…”

Section: Introductionmentioning

confidence: 99%

All polymer asymmetric Mach–Zehnder interferometer waveguide sensor by imprinting bonding and laser polishing

Liu¹,

Sun²,

Yi³

et al. 2017

We present an all polymer asymmetric Mach-Zehnder interferometer (AMZI) waveguide sensor based on imprinting bonding and laser polishing method. The fabrication methods are compatible with high accuracy waveguide sensing structure. The rectangle waveguide structure of this sensor has three sensing surfaces contacting the test media, and its sensing accuracy can be increased 5 times compared with that of one surface sensing structure. An AMZI device structure is designed. The single mode condition, the length of the sensing arm, and the length deviation between the sensing arm and the reference arm are optimized. The length deviation is optimized to be 19.8 µm in a refractive index range between 1.470 and 1.545. We fabricate the AMZI waveguide by lithography and wet etching method. The imprinting bonding and laser polishing method is proposed and investigated. The insertion loss is between −80.36 dB and −10.63 dB. The average and linear sensitivity are 768.1 dB/RIU and 548.95 dB/RIU, respectively. And the average and linear detection resolution of the sensor are 1.30×10 −6 RIU (RIU: refractive index unit) and 1.82×10 −5 RIU, respectively. This sensor has a fast and cost-effective fabrication process which can be used in the cases of requiring portability and disposability.

“…[11,12] Tunable filters have received much attention due to their increasing importance in improving the flexibilities of current and future wireless communication systems. [13][14][15][16][17][18] Superconducting tunable filters with the advantages of low insertion loss, steep band-edge, and high outof-band rejection are attractive for these applications. [19][20][21][22] A tunable filter is generally required to possess a constant absolute bandwidth with the tunable center frequency.…”

Section: Introductionmentioning

confidence: 99%

Superconducting tunable filter with constant bandwidth using coplanar waveguide resonators

Jiang¹,

Li²,

Wei³

et al. 2017

In this paper we propose a two-pole varactor-tuned superconducting filter using coplanar waveguide (CPW) spiralin-spiral-out (SISO) resonators. Novel internal and external coupling structures are introduced to meet the requirements for a tunable filter with a constant absolute bandwidth. The fabricated device has a frequency tuning range of 14.4% at frequencies ranging from 274.1 MHz to 317.7 MHz, a 3-dB bandwidth of 5.14 ± 0.06 MHz, and an insertion loss of 0.08 dB-0.70 dB. The simulated and measured results are in excellent agreement with each other.