On-chip optical true time delay lines featuring one-dimensional fishbone photonic crystal waveguide

Chung, Chi-Jui; Xu, Xiaochuan; Wang, Gencheng; Pan, Zeyu; Chen, Ray T.

doi:10.1063/1.5006188

Cited by 32 publications

(19 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The gain characteristics of the hybrid waveguide amplifier are simulated by a six-level system model for Er 3+ –Yb 3+ codoped waveguide amplifier 12 . Gain characteristics with different Er 3+ concentration of the hybrid waveguide are shown in Fig.…”

Section: Design and Simulationmentioning

confidence: 99%

“…However, the discrete waveguide amplifiers are not suitable for the ultra-long device (such as delay line chips) and highly integrated chips (such as three dimensional photonic integrated circuit (3D PIC) and optics electronic integrated circuit (OEIC)) 12–15 . It is because that gain performances of the discrete waveguide amplifiers are restricted by the pumping method.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Polymer-Silica Hybrid On-Chip Amplifier with Vertical Pumping Method

Cao

Lin

Sun

et al. 2018

Sci Rep

View full text Add to dashboard Cite

This article demonstrates a multilayer polymer-silica hybrid on-chip amplifier combining mode division multiplexing method. The multilayer amplifier consists of a pumping silica waveguide and an amplifying polymer waveguide. The pumping waveguide possesses the stability and the high damage threshold. The amplifying waveguide takes the advantages of the high compatibility and the high doping rate. The vertical pump of mode division multiplexing method can introduce the pumping light into the amplifying waveguide at any desired position of the chip. By the isolation method between signal and pumping light, the pumping light can be coupled into the amplifying waveguide, while the signal light cannot be coupled into the pumping waveguide. The parameters of doping rates, waveguide lengths, overlap factors, coupling parameters are calculated to optimize the gain characteristics of the amplifier. The amplifier with three position-optimized pumping light was designed achieving a maximum gain of 33.89 dB/cm with a waveguide length of 6 cm, a signal power of 0.1 mW and a pumping power of 300 mW. This polymer-silica hybrid amplifier is promising for the on-chip loss compensation of the 3D photonic integrated circuits and all optical transistors.

show abstract

Section: Design and Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polymer-Silica Hybrid On-Chip Amplifier with Vertical Pumping Method

Cao

Lin

Sun

et al. 2018

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The phenomenon of structural slow light, that is, low group velocity due to the waveguide structure, is well-known and has been widely studied and used in 2D photonic crystal line-defect waveguides (PhCW) [5]- [7]. In contrast with PhCW, there has been little research and even fewer experimental demonstrations concerned with structural slow light in one-dimensional photonic crystals (1D-PhC), that is, periodic waveguides like SWGs [8]- [10]. Structural slow light can be used in many important applications like on-chip compact delay lines, all-optical switching and signal buffering for optical storage [11].…”

Section: Introductionmentioning

confidence: 99%

Slow Light in Subwavelength Grating Waveguides

Jean

Gervais

LaRochelle

et al. 2020

IEEE J. Select. Topics Quantum Electron.

View full text Add to dashboard Cite

Structural slow light is the dispersion engineering process by which the group velocity of light can be drastically reduced in a periodic waveguide structure. Enabling large group delay and enhancing the light-matter interaction on a subwavelength scale, on-chip slow light is of great interest in a vast array of fields such as non-linear optic, sensing, laser physics, telecommunication and computing. In this work, we experimentally demonstrate, for the first time, slow light in subwavelength grating waveguides on the silicon-on-insulator platform. We present a comprehensive numerical study in analytical modelling and 3D FDTD. Multiple waveguides variations were fabricated using an electron-beam lithography process. Figures of merit such as group index, bandwidth and loss-per-delay are examined in both theory and experiment. A maximum measured group index of 47.74 with a loss-per-delay of 103.37 dB/ns has been achieved near the wavelength of 1550 nm. A broad bandwidth of 8.82 nm was measured, in which the group index remains larger than 10. We also show that the region of slow light operation can be shifted over a large wavelength span by controlling a single design parameter.

show abstract

“…Some rigid tunability of the device spectrum has been demonstrated through global thermal [18] or electronic tuning [19]. Narrowband delay has also been demonstrated using multi-section gratings at the band-edge [20,21]. However, for future Photonic Integrated Circuits (PICs), true tunable dispersion on-chip will be a valuable component functionality.…”

Section: Introductionmentioning

confidence: 99%

Active On-Chip Dispersion Control Using a Tunable Silicon Bragg Grating

2019

View full text Add to dashboard Cite

Actively controllable dispersion in on-chip photonic devices is challenging to implement compared with free space optical components where mechanical degrees of freedom can be employed. Here, we present a method by which continuously tunable group delay control is achieved by modulating the refractive index profile of a silicon Bragg grating using thermo-optic effects. A simple thermal heater element is used to create tunable thermal gradients along the grating length, inducing chirped group delay profiles. Both effective blue and red chirp are realised using a single on-chip device over nanometre scale bandwidths. Group delay slopes are continuously tunable over a few ps/nm range from red to blue chirp, compatible with on-chip dispersion compensation for telecommunications picosecond pulse systems.

show abstract

On-chip optical true time delay lines featuring one-dimensional fishbone photonic crystal waveguide

Cited by 32 publications

References 19 publications

Polymer-Silica Hybrid On-Chip Amplifier with Vertical Pumping Method

Polymer-Silica Hybrid On-Chip Amplifier with Vertical Pumping Method

Slow Light in Subwavelength Grating Waveguides

Active On-Chip Dispersion Control Using a Tunable Silicon Bragg Grating

Contact Info

Product

Resources

About