Realization and performance of as-fabricated SGDBR multiwavelength laser arrays

2001 ◽  
Vol 13 (9) ◽  
pp. 933-935 ◽  
Author(s):  
Ing-Fa Jang ◽  
San-Liang Lee ◽  
Chi-Yu Wang ◽  
Lih-Wen Lai ◽  
Wen-Jeng Ho ◽  
...  
Keyword(s):  
Laser Arrays ◽  
And Performance ◽  
Multiwavelength Laser

Photonic integrated multiwavelength laser arrays: Recent progress and perspectives

2020 ◽  
Vol 116 (18) ◽  
pp. 180501 ◽  
Author(s):  
San-Liang Lee ◽  
Tien-Chang Lu ◽  
Yung-Jr Hung ◽  
Lih-Ren Chen ◽  
Zhen-Ting Huang
Keyword(s):  
Recent Progress ◽  
Laser Arrays ◽  
Multiwavelength Laser

MULTIWAVELENGTH LIGHT SOURCE WITH INTEGRATED DFB LASER ARRAY AND STAR COUPLER FOR WDM LIGHTWAVE COMMUNICATIONS

1994 ◽  
Vol 05 (01) ◽  
pp. 91-109 ◽  
Author(s):  
C.E. ZAH ◽  
J. GAMELIN ◽  
B. PATHAK ◽  
F. FAVIRE ◽  
P.S.D. LIN ◽  
...  
Keyword(s):  
Low Cost ◽  
Single Mode ◽  
Cost Effective ◽  
Single Mode Fiber ◽  
Laser Source ◽  
Photonic Integration ◽  
Laser Array ◽  
Laser Arrays ◽  
Wavelength Division ◽  
Multiwavelength Laser

We discuss the advantages of wavelength-division-multiplexed (WDM) lightwave systems and the need for monolithically integrated multiwavelength laser arrays. For WDM light-wave systems to be cost effective, it is important to reduce the per-wavelength component cost. By photonic integration, the packaging and the control circuitry will be shared among all the wavelengths. In this paper, we review the multiwavelength laser arrays, the array coupling, and the photonic integration approach. We have demonstrated the monolithic integration of a 21-wavelength multi-quantum-well distributed-feedback laser array with a star coupler and optical amplifiers on the same chip. Operating a packaged module under CW operation, we obtained as many as 15 individual wavelengths simultaneously launched from one output port of the star coupler of this integrated chip into one lensed single-mode fiber. We also characterized the thermal and the electrical crosstalk from the neighboring lasers. This integrated chip stands a good chance of being a compact and low-cost multiwavelength laser source for future WDM lightwave systems.

scholarly journals Fabrication of Low-Cost Multiwavelength Laser Arrays for OLTs in WDM-PONs by Combining the SAG and BIG Techniques

2015 ◽  
Vol 7 (4) ◽  
pp. 1-7 ◽  
Author(s):  
Liangshun Han ◽  
Song Liang ◽  
Huitao Wang ◽  
Junjie Xu ◽  
Lijun Qiao ◽  
...  
Keyword(s):  
Low Cost ◽  
Laser Arrays ◽  
Multiwavelength Laser

A Special Sampling Structure with an Arbitrary Equivalent-Phase-Shift for Semiconductor Lasers and Multiwavelength Laser Arrays

2011 ◽  
Vol 28 (7) ◽  
pp. 074207 ◽  
Author(s):  
Ya-Ting Zhou ◽  
Yue-Chun Shi ◽  
Si-Min Li ◽  
Sheng-Chun Liu ◽  
Xiang-Fei Chen
Keyword(s):  
Phase Shift ◽  
Semiconductor Lasers ◽  
Laser Arrays ◽  
Sampling Structure ◽  
Multiwavelength Laser

Transmission Scanning Electron Microscopy and Energy Analysis with the Siemens ELMISKOP 101

1972 ◽  
Vol 30 ◽  
pp. 450-451
Author(s):  
H. M. Thieringer
Keyword(s):  
Objective Lens ◽  
Transmission Microscopy ◽  
Image Recording ◽  
Mode Of Operation ◽  
Scanning Transmission ◽  
Electron Microscopes ◽  
And Performance ◽  
Convergent Beam ◽  
Ray Path ◽  
Beam Diffraction

It has repeatedly been show that with conventional electron microscopes very fine electron probes can be produced, therefore allowing various micro-techniques such as micro recording, X-ray microanalysis and convergent beam diffraction. In this paper the function and performance of an SIEMENS ELMISKOP 101 used as a scanning transmission microscope (STEM) is described. This mode of operation has some advantages over the conventional transmission microscopy (CTEM) especially for the observation of thick specimen, in spite of somewhat longer image recording times.Fig.1 shows schematically the ray path and the additional electronics of an ELMISKOP 101 working as a STEM. With a point-cathode, and using condensor I and the objective lens as a demagnifying system, an electron probe with a half-width ob about 25 Å and a typical current of 5.10-11 amp at 100 kV can be obtained in the back focal plane of the objective lens.

Angular Resolved Electron Spectroscopy with Parallel Recording

1990 ◽  
Vol 48 (2) ◽  
pp. 370-371
Author(s):  
Huang Min ◽  
P.S. Flora ◽  
C.J. Harland ◽  
J.A. Venables
Keyword(s):  
Electron Spectroscopy ◽  
Low Voltage ◽  
Solid Angle ◽  
Detection System ◽  
Voltage Electron ◽  
Cylindrical Mirror ◽  
Inner Radius ◽  
Channel Plate ◽  
And Performance ◽  
Type Detector

A cylindrical mirror analyser (CMA) has been built with a parallel recording detection system. It is being used for angular resolved electron spectroscopy (ARES) within a SEM. The CMA has been optimised for imaging applications; the inner cylinder contains a magnetically focused and scanned, 30kV, SEM electron-optical column. The CMA has a large inner radius (50.8mm) and a large collection solid angle (Ω > 1sterad). An energy resolution (ΔE/E) of 1-2% has been achieved. The design and performance of the combination SEM/CMA instrument has been described previously and the CMA and detector system has been used for low voltage electron spectroscopy. Here we discuss the use of the CMA for ARES and present some preliminary results.The CMA has been designed for an axis-to-ring focus and uses an annular type detector. This detector consists of a channel-plate/YAG/mirror assembly which is optically coupled to either a photomultiplier for spectroscopy or a TV camera for parallel detection.

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