All-Optical Wavelength-Selective Switch Consisting of Asymmetric X-Junction Couplers and Raman Amplifiers for Wide Wavelength Range

Kishikawa, Hiroki; Kimiya, Kenta; Goto, Nobuo; Yanagiya, Shin-ichiro

doi:10.1109/jlt.2009.2036450

Cited by 12 publications

(5 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[7]. This proposed switch can be operated over a wide wavelength range because the saturable absorption in graphene is observed in a wide wavelength range [5] in addition to the wavelength insensitive configuration of the proposed device [8]. This amplification coefficient corresponds to the value ð1 þ ffiffiffi 2 p Þ 2 ' 5:827 (7.65 dB) for light intensity.…”

Section: Optical Switch Configuration and Conditions Required For Swi...mentioning

confidence: 89%

“…Switching can be operated by controlling the amplitude of the incident signal light. In our first proposed device, optical Raman amplifiers were employed to control the signal light, where multiple-wavelength signals can be independently controlled by wavelength multiplexed control light [8]. Similar switching can be realized by controlling absorption for signal light.…”

Section: Optical Switch Configuration and Conditions Required For Swi...mentioning

confidence: 99%

See 1 more Smart Citation

Saturable Absorption by Vertically Inserted or Overlaid Monolayer Graphene in Optical Waveguide for All-Optical Switching Circuit

et al. 2013

Self Cite

View full text Add to dashboard Cite

Optical saturable absorption through a monolayer graphene vertically inserted between fibers and overlaid on an ion-exchanged waveguide was measured for picosecond switching application. In our proposed switch, complete switching is performed by controlling the signal light amplitude with the configuration of two cascaded Mach-Zehnder interferometers. To control the signal light amplitude, we use saturable absorption in graphene. For switching, the modulation depth of the amplitude is required to be 2.414, which corresponds to 7.65 dB in intensity. The modulation depth of absorption larger than 10 dB was experimentally obtained in the graphene-loaded waveguide with length of 7 mm.

show abstract

Section: Optical Switch Configuration and Conditions Required For Swi...mentioning

confidence: 89%

Section: Optical Switch Configuration and Conditions Required For Swi...mentioning

confidence: 99%

Saturable Absorption by Vertically Inserted or Overlaid Monolayer Graphene in Optical Waveguide for All-Optical Switching Circuit

et al. 2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…Raman spectroscopy has been applied to the characterization of epitaxial graphene, graphene-based biosensors 26) , and a switch architecture controlled by waveguide-type Raman amplifiers proposed by Kishikawa et al 27) Large-area, high-quality SERS nanocomposites are necessary for the development of plasmonic devices employing Raman amplifiers, and gold-graphene nanocomposites were examined in the present study.…”

Section: Introductionmentioning

confidence: 99%

Microscopic Raman study of graphene on 4H-SiC two-dimensionally enhanced by surface roughness and gold nanoparticles

Matsumura

Yanagiya

Nagase

et al. 2016

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

We present microscopic Raman spectroscopy measurements on single-layer graphene epitaxially grown on 4H-SiC by a thermal decomposition method. We collected spectral data with spatial resolution, which allowed us to obtain twodimensionally enhanced Raman mapping images. Shallow holes in SiC, which had areas of 5 to 20 µm and depths of 100 nm, enhanced the Raman intensity of the 2D band of graphene. A monolayer of gold nanoparticle (AuNP) aggregates was successfully prepared by dropping and drying a colloidal suspension of AuNPs. The AuNP exhibited 30-fold enhanced the Raman spectra in the wavenumber range of 1550-1700 cm −1. Locally enhanced Raman intensity was also demonstrated using a glass microbead.

show abstract

“…We have proposed an all-optical switch controlled by Raman amplification [4,5] or by saturable absorption [6][7][8], where optical signal amplitude is controlled instead of the signal phase. In the previously proposed switches, refractive-index change induced by all optical nonlinear interactions was assumed to be small enough to be negligible [4,6] or to be adjusted at an integer multiple of 2π [7].…”

Section: Introductionmentioning

confidence: 99%

“…In the previously proposed switches, refractive-index change induced by all optical nonlinear interactions was assumed to be small enough to be negligible [4,6] or to be adjusted at an integer multiple of 2π [7]. When we assume graphene sheets as the saturable absorbing material, the induced refractive-index change cannot be ignored [9].…”

Section: Introductionmentioning

confidence: 99%

All-Optical Waveguide-Type Switch Using Saturable Absorption in Graphene

Takahashi¹,

Kishikawa²,

Goto³

et al. 2015

Optoelectronics - Materials and Devices

View full text Add to dashboard Cite

An all-optical switch using saturable absorption that accompanies refractive-index change such as in graphene films is proposed. The switching conditions are theoretically derived for arbitrary values of absorption and refractive-index change. It is found that switching can be performed by weaker control light when the refractiveindex change is accompanied in saturable absorption. Switching conditions for various combinations of absorption and refractive-index change are confirmed by FD-BPM simulation. As an experimental demonstration of saturable absorption in graphene, we discuss measured nonlinear absorption in a graphene-loaded waveguide. The saturable absorption and refractive-index change through vertically placed multilayered graphene sheets are also discussed based on reported experimental results.

show abstract

All-Optical Wavelength-Selective Switch Consisting of Asymmetric X-Junction Couplers and Raman Amplifiers for Wide Wavelength Range

Cited by 12 publications

References 17 publications

Saturable Absorption by Vertically Inserted or Overlaid Monolayer Graphene in Optical Waveguide for All-Optical Switching Circuit

Saturable Absorption by Vertically Inserted or Overlaid Monolayer Graphene in Optical Waveguide for All-Optical Switching Circuit

Microscopic Raman study of graphene on 4H-SiC two-dimensionally enhanced by surface roughness and gold nanoparticles

All-Optical Waveguide-Type Switch Using Saturable Absorption in Graphene

Contact Info

Product

Resources

About