Single-lateral-mode operation of 980-nm InGaAs-(Al)GaAs pump lasers with uncoated and coated facets

1996 ◽  
Vol 8 (5) ◽  
pp. 605-607 ◽  
Author(s):  
A. Paradisi ◽  
A. de Campos Sachs ◽  
A. Gobbi ◽  
J.R. Filho ◽  
R.B. Martins
Keyword(s):  
Mode Operation ◽  
Lateral Mode ◽  
Pump Lasers

Highly reliable and stable-lateral-mode operation of high-power 0.98-μm InGaAs-InGaAsP lasers with an exponential-shaped flared stripe

1997 ◽  
Vol 3 (2) ◽  
pp. 666-671 ◽  
Author(s):  
M. Sagawa ◽  
K. Hiramoto ◽  
T. Toyonaka ◽  
T. Kikawa ◽  
S. Fujisaki ◽  
...  
Keyword(s):  
High Power ◽  
Mode Operation ◽  
Lateral Mode

Record Wear Studies by Scanning Electron Microscopy

1968 ◽  
Vol 26 ◽  
pp. 364-365
Author(s):  
M.D. Coutts ◽  
E.R. Levin ◽  
J.G. Woodward
Keyword(s):  
Electron Microscopy ◽  
Constant Velocity ◽  
Peak Velocity ◽  
Great Depth ◽  
Depth Of Focus ◽  
Sweep Frequency ◽  
Transmission Electron ◽  
Test Record ◽  
Lateral Mode ◽  
Scanning Electron

While record grooves have been studied by transmission electron microscopy with replica techniques, and by optical microscopy, the former are cumbersome and restricted and the latter limited by lack of depth of focus and resolution at higher magnification. With its great depth of focus and ease in specimen manipulation, the scanning electron microscope is admirably suited for record wear studies.A special RCA sweep frequency test record was used with both lateral and vertical modulation bands. The signal is a repetitive, constant-velocity sweep from 2 to 20 kHz having a duration and repetitive rate of approximately 0.1 sec. and a peak velocity of 5.5 cm/s.A series of different pickups and numbers of plays were used on vinyl records. One centimeter discs were then cut out, mounted and coated with 200 Å of gold to prevent charging during examination. Wear studies were made by taking micrographs of record grooves having 1, 10 and 50 plays with each stylus and comparing with typical “no-play” grooves. Fig. 1 shows unplayed grooves in a vinyl pressing with sweep-frequency modulation in the lateral mode.

Stable operation of multiple-lateral-mode ridge-waveguide lasers for high-speed printing

1997 ◽  
Vol 33 (3) ◽  
pp. 214
Author(s):  
R. LaComb ◽  
D.K. Wagner ◽  
L. DiMarco ◽  
J. Connolly
Keyword(s):  
High Speed ◽  
Ridge Waveguide ◽  
Stable Operation ◽  
Waveguide Lasers ◽  
Lateral Mode ◽  
Ridge Waveguide Lasers
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