Novel design scheme for high-speed MQW lasers with enhanced differential gain and reduced carrier transport effect

1998 ◽  
Vol 34 (12) ◽  
pp. 2340-2349 ◽  
Author(s):  
Y. Matsui ◽  
H. Murai ◽  
S. Arahira ◽  
Y. Ogawa ◽  
A. Suzuki
Keyword(s):  
High Speed ◽  
Carrier Transport ◽  
Design Scheme ◽  
Differential Gain ◽  
Transport Effect ◽  
Novel Design

Carrier transport effect on the high speed modulation performance of integrated optoelectronic transceiving chip

2022 ◽  
Vol 54 (2) ◽  
Author(s):  
Kai Liu ◽  
Yongqing Huang ◽  
Xiaofeng Duan ◽  
Xiaomin Ren ◽  
Qi Wang ◽  
...  
Keyword(s):  
High Speed ◽  
Carrier Transport ◽  
Transport Effect ◽  
Speed Modulation ◽  
High Speed Modulation

Synthesis of Inertially Compensated Variable-Speed Cams

2003 ◽  
Vol 125 (3) ◽  
pp. 593-601 ◽  
Author(s):  
B. Demeulenaere ◽  
J. De Schutter
Keyword(s):  
High Speed ◽  
Design Procedure ◽  
Variable Speed ◽  
Speed Variation ◽  
Design Choice ◽  
Cam Follower ◽  
Speed Fluctuation ◽  
Novel Design

Traditionally, cam-follower systems are designed by assuming a constant camshaft speed. Nevertheless, all cam-follower systems, especially high-speed systems, exhibit some camshaft speed fluctuation (despite the presence of a flywheel) which causes the follower motions to be inaccurate. This paper therefore proposes a novel design procedure that explicitly takes into account the camshaft speed variation. The design procedure assumes that (i) the cam-follower system is conservative and (ii) all forces are inertial. The design procedure is based on a single design choice, i.e., the amount of camshaft speed variation, and yields (i) cams that compensate for the inertial dynamics for any period of motion and (ii) a camshaft flywheel whose (small) inertia is independent of the period of motion. A design example shows that the cams designed in this way offer the following advantages, even for non-conservative, non-purely inertial cam-follower systems: (i) more accurate camshaft motion despite a smaller flywheel, (ii) lower motor torques, (iii) more accurate follower motions, with fewer undesired harmonics, and (iv) a camshaft motion spectrum that is easily and robustly predictable.

Design of Online Pipeline Ultrasonic Data Acquisition and Storage System Based on PCI Bus

2014 ◽  
Vol 651-653 ◽  
pp. 2296-2300
Author(s):  
Jing Huang ◽  
She Yu Zhou ◽  
Bing Lei Guan
Keyword(s):  
Data Acquisition ◽  
Ultrasonic Testing ◽  
High Speed ◽  
Storage System ◽  
Ultrasonic Signal ◽  
Pci Bus ◽  
Online Data ◽  
Embedded Processor ◽  
Design Scheme ◽  
And Storage

Based on the theory of ultrasonic testing, an online data-acquisition and storage system is designed. The design scheme of hardware and software of the system is introduced in this paper, in which the embedded processor DSP and FPGA is used as its control core and the interface of PCI bus and DSP is designed. Thus a high speed and large-capacity ultrasonic signal can be processed, furthermore the pipelines defects can be analyze and evaluate.

1.55 μm High Speed Partly Gain-Coupled DFB Lasers with Periodically Etched Strained-Layer Quantum Wells

1997 ◽  
Vol 08 (03) ◽  
pp. 475-494 ◽  
Author(s):  
Toshihiko Makino
Keyword(s):  
Quantum Wells ◽  
High Speed ◽  
Carrier Transport ◽  
Stop Band ◽  
Longitudinal Distribution ◽  
Modulation Bandwidth ◽  
Carrier Injection ◽  
Strained Layer ◽  
High Modulation ◽  
Dfb Laser

The high speed performance of partly gain-coupled (GC) DFB lasers consisting of periodically etched strained-layer quantum wells (QW's) is reviewed with comparisons to the equivalent index-coupled (IC) DFB lasers with the same active layers. It is shown that the GC DFB laser has a –3 dB modulation bandwidth of 22 GHz at 10 mW with a stable single mode oscillation at the longer side of the Bragg Stop-band due to in-phase gain coupling. A theoretical analysis is also presented based on the local-normal-mode transfer-matrix laser model which takes into account both the longitudinal distribution of laser parameters and carrier transport effects. The mechanism for high modulation bandwidth of the GC DFB laser is attributed to a higher differential gain due to a reduced carrier transport time which is provided by an effecient carrier injection from the longitudinal etched interface of the QW's.

scholarly journals Carrier Transport in High-Mobility III–V Quantum-Well Transistors and Performance Impact for High-Speed Low-Power Logic Applications

2008 ◽  
Vol 29 (10) ◽  
pp. 1094-1097 ◽  
Author(s):  
G. Dewey ◽  
M.K. Hudait ◽  
Kangho Lee ◽  
R. Pillarisetty ◽  
W. Rachmady ◽  
...  
Keyword(s):  
Quantum Well ◽  
Low Power ◽  
High Speed ◽  
Carrier Transport ◽  
High Mobility ◽  
Performance Impact ◽  
And Performance ◽  
Low Power Logic
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