Monolithically integrated photo-receiver with optical waveguides for future 100-Gbit/s class OEICs

2003 ◽  
Author(s):  
T. Akeyoshi ◽  
S. Aoyama ◽  
T. Ishii ◽  
A. Aratake ◽  
K. Onodera ◽  
...  
Keyword(s):  
Optical Waveguides ◽  
Monolithically Integrated ◽  
Photo Receiver

Integrated Ψ-Type Photonic Polarization Diversity Receivers for Wireless Radio-over-Fiber Communication Links

2013 ◽  
Vol 2013 (1) ◽  
pp. 000213-000216
Author(s):  
V. Rymanov ◽  
S. Dülme ◽  
M. Wachholz ◽  
M. Palandöken ◽  
T. Tekin ◽  
...  
Keyword(s):  
Optical Waveguides ◽  
Radio Over Fiber ◽  
Coupling Length ◽  
Length Variation ◽  
Polarization Diversity ◽  
Output Section ◽  
Fiber Communication ◽  
Monolithically Integrated ◽  
Communication Links ◽  
Integrated Device

In this work, we present novel integrated Ψ-type photonic polarization diversity receivers (PPDRs), comprising two high-frequency 1.55 μm photodiodes (PDs) applicable in wireless radio-over-fiber (RoF) communication links. Therefore, geometries in the overall optical beam splitter (OBS) output section, e.g. optical mode-guiding stripe height, gap between the optical waveguides (WGs), WG widths and coupling length, are considered to obtain high polarization diversity for the developed PPDRs. Moreover, we demonstrate first experimental achievements based on the coupling length variation. In comparison to a conventional 3-dB Y-coupler-integrated device, the experimental results show a polarization-dependent behavior of the PPDR with a maximum polarization dependent loss (PDL) of >3 dB (e.g. measured at the WG-PDs) due to the integrated Ψ-type OBS output section. Taking further geometry parameters of the PPDR into consideration, an increased PDL is expected for the monolithically integrated WG-PDs.

scholarly journals Mid-Infrared Electro-Optical Modulation Using Monolithically Integrated Titanium Dioxide on Lithium Niobate Optical Waveguides

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Tiening Jin ◽  
Junchao Zhou ◽  
Pao Tai Lin
Keyword(s):  
Optical Waveguides ◽  
Optical Switch ◽  
Optical Field ◽  
Optical Modulation ◽  
Pockels Effect ◽  
Hybrid Mode ◽  
Mid Infrared ◽  
Monolithically Integrated ◽  
Ridge Height ◽  
Small Footprint

Abstract Tunable photonic circuits were demonstrated in the mid-Infrared (mid-IR) regime using integrated TiO2-on-LiNbO3 (ToL) waveguides. The upper waveguide ridge was made by a sputtered TiO2 thin film with broad transparency at λ = 0.4–8 µm and an optimized refractive index n = 2.39. The waveguide substrate is a z-cut single crystalline LiNbO3 (LN) wafer that has strong Pockels effect, thus enabling the tunability of the device through electro-optical (E-O) modulation. A sharp waveguide mode was obtained at λ = 2.5 µm without scattering or mode distortion found. The measured E-O coefficient γeff was 5.9 pm/V approaching γ31 of 8.6 pm/V of LN. The ToL waveguide showed a hybrid mode profile where its optical field can be modified by adjusting the TiO2 ridge height. Our monolithically integrated ToL modulator is an efficient and small footprint optical switch critical for the development of reconfigurable photonic chips.

Monolithically integrated InGaAs/InP MSM-FET photo-receiver prepared by chemical beam epitaxy

1990 ◽  
Vol 105 (1-4) ◽  
pp. 162-167 ◽  
Author(s):  
L. Yang ◽  
A.S. Sudbo ◽  
W.T. Tsang ◽  
P.A. Garbinski ◽  
R.M. Camarda
Keyword(s):  
Chemical Beam Epitaxy ◽  
Monolithically Integrated ◽  
Photo Receiver

TEM characterization of proton-exchanged LiNbO3 optical waveguides

1986 ◽  
Vol 44 ◽  
pp. 480-481
Author(s):  
W. E. Lee
Keyword(s):  
Refractive Index ◽  
Benzoic Acid ◽  
Optical Waveguides ◽  
Total Internal Reflection ◽  
Index Of Refraction ◽  
Optical Measurements ◽  
Lithium Ions ◽  
Wide Channel ◽  
Tem Characterization

An optical waveguide consists of a several-micron wide channel with a slightly different index of refraction than the host substrate; light can be trapped in the channel by total internal reflection.Optical waveguides can be formed from single-crystal LiNbO3 using the proton exhange technique. In this technique, polished specimens are masked with polycrystal1ine chromium in such a way as to leave 3-13 μm wide channels. These are held in benzoic acid at 249°C for 5 minutes allowing protons to exchange for lithium ions within the channels causing an increase in the refractive index of the channel and creating the waveguide. Unfortunately, optical measurements often reveal a loss in waveguiding ability up to several weeks after exchange.

Intrinsic mode theory of tapered optical waveguides

1985 ◽  
Vol 132 (6) ◽  
pp. 314 ◽  
Author(s):  
J.M. Arnold ◽  
A. Belghoraf ◽  
A. Dendane
Keyword(s):  
Optical Waveguides ◽  
Mode Theory
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