Preparation and thermal optimization of the proton-implanted high-gain Nd3+-doped laser glass waveguide

To achieve high-gain C-band waveguide amplifiers with integrated configuration, bent channel structures (S-, U-, and F-bend) based on buried Er3+/Yb3+ codoped phosphate glass waveguide channel fabricated by field-assisted annealing (FAA) have been designed in a 4´4 cm2 substrate. Using simulated-bend method, the optimal radius for the curved structure is derived to be 1.00 cm with loss coefficient of 0.0045 dB/cm. In the wavelength range of 1520-1575 nm, obvious gain enhancement for the bent structure waveguides is anticipated, and for the F-bend waveguide, the net gain at 1534 nm wavelength is derived to be 43.95 dB, which is much higher than the value of 26.67 and 13.20 dB in the U- and S-bend waveguides, respectively, and over three times higher than that of the straight one. The simulation results indicate that the bent structure designing is beneficial in obtaining high signal gain in buried Er3+/Yb3+ codoped phosphate glass waveguides, which lays the foundation for the further design and fabrication of integrated devices.

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Ultrafast Laser Inscription of a High Gain Er-doped Bismuthate Glass Waveguide Amplifier

Lasers, Sources and Related Photonic Devices ◽

10.1364/assp.2010.awb7 ◽

2010 ◽

Author(s):

R. R. Thomson ◽

S. Beecher ◽

N. D. Psaila ◽

A. K. Kar

Keyword(s):

High Gain ◽

Ultrafast Laser ◽

Glass Waveguide ◽

Er Doped

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A ridge waveguide constructed by H+ implantation and precise diamond blade dicing in high-gain Nd3+-doped laser glass

Optik ◽

10.1016/j.ijleo.2020.165881 ◽

2021 ◽

Vol 225 ◽

pp. 165881

Author(s):

Chun-Xiao Liu ◽

Jia-Li You ◽

Shuo-Qi Lin ◽

Jing-Yi Chen ◽

Min Tang ◽

...

Keyword(s):

High Gain ◽

Ridge Waveguide ◽

Laser Glass ◽

Diamond Blade

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Ultrafast laser inscription of a high-gain Er-doped bismuthate glass waveguide amplifier

Optics Express ◽

10.1364/oe.18.013212 ◽

2010 ◽

Vol 18 (12) ◽

pp. 13212 ◽

Cited By ~ 35

Author(s):

Robert R. Thomson ◽

Nicholas D. Psaila ◽

Stephen J. Beecher ◽

Ajoy K. Kar

Keyword(s):

High Gain ◽

Ultrafast Laser ◽

Glass Waveguide ◽

Er Doped

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Effect of energy filtering on micro-diffraction in the SEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010017075x ◽

1994 ◽

Vol 52 ◽

pp. 604-605

Author(s):

James F. Mancuso ◽

Leo A. Fama ◽

William B. Maxwell ◽

Jerry L. Lehman ◽

Hasso Weiland ◽

...

Keyword(s):

Detection Efficiency ◽

Ccd Camera ◽

High Gain ◽

Microchannel Plate ◽

Electrostatic Energy ◽

Energy Filtering ◽

Electron Channelling ◽

Low Energy Electrons ◽

Low Sensitivity ◽

Angular Field Of View

Micro-diffraction based crystallography is essential to the design and development of many classes of ‘crafted materials’. Although the scanning electron microscope can provide crystallographic information with high spatial resolution, its current utility is severely limited by the low sensitivity of existing diffraction techniques (ref: Dingley). Previously, Joy showed that energy filtering increased contrast and pattern visibility in electron channelling. This present paper discribes the effect of energy filtering on EBSP sensitivity and backscattered SEM imaging.The EBSP detector consisted of an electron energy filter, a microchannel plate detector, a phosphor screen, optical coupler, and a slow scan CCD camera. The electrostatic energy filter used in this experiment was constructed as a cone with 5 coaxial electrodes. The angular field-of-view of the filter was approximately 38°. The microchannel plate, which was the initial sensing component, had high gain and had 50% to 80% detection efficiency for the low energy electrons that passed through the retarding field filter.

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Equivalent Noise Dose Obtained Through Hearing Aids in the Classrooms of Hearing-Impaired Children

Language Speech and Hearing Services in Schools ◽

10.1044/0161-1461.2103.147 ◽

1990 ◽

Vol 21 (3) ◽

pp. 147-150

Author(s):

Ronald A. Wilde

Keyword(s):

Hearing Aids ◽

High Gain ◽

Hearing Impaired ◽

Deaf Children ◽

Impaired Children ◽

Very High ◽

Hearing Impaired Children

A commercial noise dose meter was used to estimate the equivalent noise dose received through high-gain hearing aids worn in a school for deaf children. There were no significant differences among nominal SSPL settings and all SSPL settings produced very high equivalent noise doses, although these are within the parameters of previous projections.

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