High sensitivity and wide-dynamic-range optical receiver for 40 Gbit∕s optical communication networks

2003 ◽  
Vol 39 (1) ◽  
pp. 91 ◽  
Author(s):  
R. Vetury ◽  
I. Gontijo ◽  
Yet-zen Liu ◽  
K. Krishnamurthy ◽  
R. Pullela ◽  
...  
Keyword(s):  
Communication Networks ◽  
Optical Communication ◽  
Dynamic Range ◽  
High Sensitivity ◽  
Optical Receiver ◽  
Wide Dynamic Range

High-sensitivity and wide-dynamic-range 10 Gbit∕s APD∕preamplifier optical receiver module

2002 ◽  
Vol 38 (13) ◽  
pp. 650 ◽  
Author(s):  
H. Matsuda ◽  
A. Miura ◽  
H. Irie ◽  
S. Tanaka ◽  
K. Ito ◽  
...  
Keyword(s):  
Dynamic Range ◽  
High Sensitivity ◽  
Optical Receiver ◽  
Wide Dynamic Range ◽  
Receiver Module

10-gigabit-per-second high-sensitivity and wide-dynamic-range APD-HEMT optical receiver

1996 ◽  
Vol 8 (9) ◽  
pp. 1232-1234 ◽  
Author(s):  
T.Y. Yun ◽  
M.S. Park ◽  
J.H. Han ◽  
I. Watanabe ◽  
K. Makita
Keyword(s):  
Dynamic Range ◽  
High Sensitivity ◽  
Optical Receiver ◽  
Wide Dynamic Range

2.5 Gbit/s Optical Receiver Front-End Circuit with High Sensitivity and Wide Dynamic Range

2017 ◽  
Vol 38 (4) ◽  
Author(s):  
Tiezhu Zhu ◽  
Taishan Mo ◽  
Tianchun Ye
Keyword(s):  
Dynamic Range ◽  
Automatic Gain Control ◽  
Optical Network ◽  
Gain Control ◽  
High Sensitivity ◽  
Cmos Technology ◽  
Optical Receiver ◽  
Passive Optical Network ◽  
Wide Dynamic Range ◽  
Front End

AbstractAn optical receiver front-end circuit is designed for passive optical network and fabricated in a 0.18 um CMOS technology. The whole circuit consists of a transimpedance amplifier (TIA), a single-ended to differential amplifier and an output driver. The TIA employs a cascode stage as the input stage and auxiliary amplifier to reduce the miller effect. Current injecting technique is employed to enlarge the input transistor’s transconductance, optimize the noise performance and overcome the lack of voltage headroom. To achieve a wide dynamic range, an automatic gain control circuit with self-adaptive function is proposed. Experiment results show an optical sensitivity of –28 dBm for a bit error rate of 10

Slow-Scan CCD Observation of Backscattering Patterns in SEM

1992 ◽  
Vol 50 (2) ◽  
pp. 1308-1309
Author(s):  
F. Ouyang ◽  
D. A. Ray ◽  
O. L. Krivanek
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Dynamic Range ◽  
High Sensitivity ◽  
Lens System ◽  
Wide Dynamic Range ◽  
Peltier Cooler ◽  
Diffraction Patterns ◽  
Scanning Electron

Electron backscattering Kikuchi diffraction patterns (BKDP) reveal useful information about the structure and orientation of crystals under study. With the well focused electron beam in a scanning electron microscope (SEM), one can use BKDP as a microanalysis tool. BKDPs have been recorded in SEMs using a phosphor screen coupled to an intensified TV camera through a lens system, and by photographic negatives. With the development of fiber-optically coupled slow scan CCD (SSC) cameras for electron beam imaging, one can take advantage of their high sensitivity and wide dynamic range for observing BKDP in SEM.We have used the Gatan 690 SSC camera to observe backscattering patterns in a JEOL JSM-840A SEM. The CCD sensor has an active area of 13.25 mm × 8.83 mm and 576 × 384 pixels. The camera head, which consists of a single crystal YAG scintillator fiber optically coupled to the CCD chip, is located inside the SEM specimen chamber. The whole camera head is cooled to about -30°C by a Peltier cooler, which permits long integration times (up to 100 seconds).

scholarly journals Doubly resonant sub-ppt photoacoustic gas detection with eight decades dynamic range

2021 ◽  
Author(s):  
Zhen Wang ◽  
Hui Zhang ◽  
Qiang Wang ◽  
Simone Borri ◽  
Iacopo Galli ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Near Infrared ◽  
Dynamic Range ◽  
High Sensitivity ◽  
Fast Response ◽  
Wide Dynamic Range ◽  
Acoustic Resonators ◽  
Light Waves ◽  
Energy Environment ◽  
Small Footprint

Abstract Gas sensors with high sensitivity, wide dynamic range, high selectivity, fast response, and small footprint are desirable across a broad range of applications in energy, environment, safety, and public health. However, designing a compact gas sensor with ultra-high sensitivity and ultra-wide dynamic range remains a challenge. Laser-based photoacoustic spectroscopy (PAS) is a promising candidate to fill this gap. Herein, we report a novel method to simultaneously enhance the acoustic and light waves for PAS using integrated optical and acoustic resonators. This increases sensitivity by more than two orders of magnitude and extends the dynamic range by more than three orders of magnitude, compared with the state-of-the-art photoacoustic gas sensors. We demonstrate the concept by exploiting a near-infrared absorption line of acetylene (C2H2) at 1531.59 nm, achieving a detection limit of 0.5 parts-per-trillion (ppt), a noise equivalent absorption (NEA) of 5.7×10-13 cm-1 and a linear dynamic range of eight orders of magnitude. This study enables the realization of compact ultra-sensitive and ultra-wide-dynamic-range gas sensors in a number of different fields.

scholarly journals DC-coupled burst-mode receiver with high sensitivity, wide dynamic range and short settling time for symmetric 10G-GPONs

2011 ◽  
Vol 19 (26) ◽  
pp. B594 ◽  
Author(s):  
Jasmien Put ◽  
Xin Yin ◽  
Xing-Zhi Qiu ◽  
Jan Gillis ◽  
Jochen Verbrugghe ◽  
...  
Keyword(s):  
Dynamic Range ◽  
High Sensitivity ◽  
Settling Time ◽  
Wide Dynamic Range ◽  
Burst Mode
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