MULTI-CHANNEL ELECTRO-OPTIC POLYMER MODULATOR BASED ON A NOVEL SIDE-CHAIN POLYMER

2004 ◽  
Vol 13 (03n04) ◽  
pp. 329-334 ◽  
Author(s):  
SUNTAK PARK ◽  
JUNG JIN JU ◽  
JUNG YUN DO ◽  
SEUNG KOO PARK ◽  
MYUNG-HYUN LEE
Keyword(s):  
Thermal Stability ◽  
Optical Modulator ◽  
Side Chain ◽  
Chain Polymer ◽  
Good Thermal Stability ◽  
Half Wave ◽  
Electro Optic ◽  
Good Uniform ◽  
Insertion Losses ◽  
Channel Modulator

A multi-channel optical modulator with 16 independent modulators is fabricated using an electro-optic (EO) polymer with a large EO coefficient and good thermal stability. The 16-channel modulator has lumped type electrodes for modulation and heaters for thermal biasing. The device has good uniform modulation characteristics between individual modulators. The deviation of half-wave voltages is 0.2 V and that of insertion losses about 1 dB. Crosstalks range from -28 to -36 dB and extinction ratios are more than 21 dB.

Evaluation of Thermal Stability of Organic Electro-Optic Device by Using Thermally Stimulated Current

2016 ◽  
Vol 16 (4) ◽  
pp. 3378-3382 ◽  
Author(s):  
Ryoma Ikemoto ◽  
Dai Taguchi ◽  
Takaaki Manaka ◽  
Mitsumasa Iwamoto ◽  
Toshiki Yamada ◽  
...  
Keyword(s):  
Activation Energy ◽  
Thermal Stability ◽  
Life Time ◽  
Side Chain ◽  
Dominant Contribution ◽  
Thermally Stimulated Current ◽  
Chain Polymer ◽  
Electro Optic ◽  
Thermal Stability Of ◽  
Host Polymer

Thermally stimulated current (TSC) measurement was employed to study the thermal stability of electro-optic (EO) polymers, i.e., guest/host polymer DR1/PMMA and side-chain polymer PMMA-co-DR1. Here the isothermal relaxation test showed that the relaxation time τ (85 °C) of side-chain polymer PMMA-co-DR1 is longer than that of guest/host polymer DR1/PMMA. TSC peaks appeared symmetrically in proportion to the poling electric field Ep, indicating that DR1 molecules make a dominant contribution to dipolar depolarization. Thermal sampling (TS) method showed that the activation energy of the DR1/PMMA is around 1 eV, while that of the PMMA-co-DR1 is distributed > 1 eV. Results suggested that side-chain polymer is preferable to the guest/host polymer in the thermal stability. TSC measurement is helpful as a conventional method for studying the life time of EO polymers in terms of dipolar motion.

Characterization of Bulk BaTiO3 Material for Optical Modulator Applications

2020 ◽  
Vol 1002 ◽  
pp. 132-139
Author(s):  
Sabah Al-Ithawi ◽  
Wasan A. Hekmat ◽  
Kadhim A. Hubeatir ◽  
Shams B. Ali ◽  
Suad M. Kadhim ◽  
...  
Keyword(s):  
Sample Size ◽  
Crystalline Structure ◽  
Figure Of Merit ◽  
Optical Modulator ◽  
Effective Parameters ◽  
Good Efficiency ◽  
Half Wave Voltage ◽  
Half Wave ◽  
Electro Optic

In this work, different sizes of BaTiO3 (BTO) were characterized. The effective parameters were studied to reach optimum performance in order to realize an optical modulator. The parameters such as spectroscopy, electro-optic coefficient, crystalline structure, and birefringence indicated that BaTiO3 has an excellent behavior to manipulate the light by Pockels modulator, spatially in the field of telecom. The sample size (10×3 mm) was shown a good performance compare with other samples, for example, the BTO has low absorption, high variation of output as a function of voltage applied and good efficiency that showed by figure of merit. In addition, a low half-wave voltage (Vπ) was observed.

Janus molecules: large second-order nonlinear optical performance, good temporal stability, excellent thermal stability and spherical structure with optimized dendrimer structure

2018 ◽  
Vol 2 (7) ◽  
pp. 1374-1382 ◽  
Author(s):  
Pengyu Chen ◽  
Huanyu Zhang ◽  
Mengmeng Han ◽  
Ziyao Cheng ◽  
Qian Peng ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Nonlinear Optical ◽  
Temporal Stability ◽  
Second Order ◽  
Optical Performance ◽  
Excellent Thermal Stability ◽  
Good Thermal Stability ◽  
Spherical Structure ◽  
Electro Optic

A Janus molecule J2 containing five FTC moieties exhibited good thermal stability, excellent electro-optic performance and good temporal stability.

New Host-Guest Polymeric System for Thermal Stability Enhancement of Electro Optic Effect

2002 ◽  
Vol 725 ◽  
Author(s):  
Seung Koo Park ◽  
Jung Yun Do ◽  
Jung-Jin Ju ◽  
Suntak Park ◽  
Myung-Hyun Lee
Keyword(s):  
Thermal Stability ◽  
Model Compound ◽  
Main Chain ◽  
Side Chain ◽  
Hydroxyl Groups ◽  
New Host ◽  
Polymer Main Chain ◽  
Electro Optic ◽  
Chromophore Concentration ◽  
Stability Enhancement

AbstractA new host-guest electro optic (EO) polymer, in which a chromophore can be reacted with the polymer main chain during poling to give the corresponding side-chain EO polymer, has been prepared for improving EO effect and its thermal stability. Polyisoimide (PII) synthesized from 2, 2-bis (4-aminophenyl) hexafluoropropane and oxydiphthalic anhydride and Disperse Red 1 (DR1) were used as a host and a guest, respectively. A model compound reaction and Infrared spectra of the host-guest film after annealing at various temperatures show that the reaction between the isoimide groups in PII and the hydroxyl groups in DR1 occurs around 140 °C. The glass transition temperatures of the resulting EO polyamic aicd ester-imide copolymer with 0, 10, 20 and 30 wt. % of chromophore concentration were 275, 219, 160, and 124 °C, respectively. The EO coefficient obtained at a wavelength of 1.55 νm was 5.3 and 10.5 pm/V from the EO polymer film with 20 and 30 wt. % DR1. The EO signals exhibited only a slight decay at high temperature due to the chemical reaction between the host and guest during poling.

Side-chain electro-optic polymer modulator with wide thermal stability ranging from −46°Cto95°C for fiber-optic gyroscope applications

2005 ◽  
Vol 87 (6) ◽  
pp. 061112 ◽  
Author(s):  
Seong-Ku Kim ◽  
Yu-Chueh Hung ◽  
Byoung-Joon Seo ◽  
K. Geary ◽  
W. Yuan ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Fiber Optic ◽  
Side Chain ◽  
Fiber Optic Gyroscope ◽  
Electro Optic

Electro‐optic side‐chain polyimide system with large optical nonlinearity and high thermal stability

1994 ◽  
Vol 64 (17) ◽  
pp. 2197-2199 ◽  
Author(s):  
Wataru Sotoyama ◽  
Satoshi Tatsuura ◽  
Tetsuzo Yoshimura
Keyword(s):  
Thermal Stability ◽  
Optical Nonlinearity ◽  
High Thermal Stability ◽  
Side Chain ◽  
Electro Optic

Dielectric Relaxation Spectroscopic Measurements on a Novel Electroactive Polyimide

1999 ◽  
Vol 600 ◽  
Author(s):  
Saadi Abdul Jawad ◽  
Abdalla Alnajjar ◽  
Mamoun M. Bader
Keyword(s):  
Activation Energy ◽  
Thermal Stability ◽  
Dielectric Constant ◽  
Electric Modulus ◽  
High Thermal Stability ◽  
Side Chain ◽  
Electrical Behavior ◽  
Frequency Range ◽  
Kcal Mole ◽  
Electro Optic

AbstractAC electrical behavior of a novel aromatic electro-optic polyimide was investigated in the temperature range 25 °C to 300 °C and a frequency range from 1 Hz to 106 Hz. Three electrical quantities: impedance, permittivity and electric modulus are reported. The dependence of imaginary and real components of these quantities on temperature and frequency are discussed. The experimental results show that the polymer has high thermal stability below 200 °C, where the resistivity, dielectric constant and permittivity are nearly temperature-independent indicating highly rigid structure. Above this temperature, however, a well-defined broad peak corresponding to a relaxation process was observed for which the activation energy was calculated to be 8.5 Kcal/mole. This relaxation is associated with a restricted local rotational motion of the side chain chromophore.

Nonlinear optical side‐chain polymer with high thermal stability and its pyroelectric thermal analysis

1993 ◽  
Vol 63 (15) ◽  
pp. 2018-2020 ◽  
Author(s):  
S. Bauer ◽  
W. Ren ◽  
Ş. Yilmaz ◽  
W. Wirges ◽  
W.‐D. Molzow ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Nonlinear Optical ◽  
High Thermal Stability ◽  
Side Chain ◽  
Chain Polymer
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