High Power InAsSb/InAsSbP Laser Diodes Emitting at 3 ∼ 5 μm Range

1996 ◽  
Vol 450 ◽  
Author(s):  
M. Razeghi ◽  
J. Diaz ◽  
H. J. Yi ◽  
D. Wu ◽  
B. Lane ◽  
...  
Keyword(s):  
Active Region ◽  
Energy Gap ◽  
Maximum Output Power ◽  
Multiple Quantum Well ◽  
Laser Diodes ◽  
Chemical Vapor ◽  
Threshold Current ◽  
Multiple Quantum ◽  
Maximum Output ◽  
Double Heterostructure

ABSTRACTWe report metalorganic chemical vapor deposition-grown double heterostructure and multiple quantum well InAsSb/InAsSbP laser diodes emitting at 3 to 4 μm and light emitting diodes up to 5 μm. Maximum output power up to 1 W (from two facets) with differential efficiency above 70 % up to 150 K was obtained from a MQW laser with stripe width of 100 μm and cavity length of 700 μm for emitting wavelength of 3.6 μm at 90 K. Maximum operating temperature up to 220 K with threshold current density of 40 A/cm2 at 78 K were achieved from the double-heterostructure lasers emitting at 3.2 μm. The far-field beam divergence as narrow as 24° was achieved with the use of higher energy gap barrier layers, i.e., lower effective refractive index, in MQW active region. We also discuss the effect of composition-fluctuation in the InAsSb active region on the gain and threshold current of the lasers.

Experimental study on the mechanism governing spectral shifts in low power 670 nm AlGaInP multiple quantum well (MQW) laser diodes over temperature range 5–45 °C

2016 ◽  
Vol 94 (7) ◽  
pp. 640-644 ◽  
Author(s):  
Santosh Chackrabarti ◽  
Dhrub Sharma ◽  
Shereena Joseph ◽  
Tho-alfiqar A. Zaker ◽  
A.K. Hafiz ◽  
...  
Keyword(s):  
Quantum Well ◽  
Low Power ◽  
Band Gap ◽  
Characteristic Temperature ◽  
Multiple Quantum Well ◽  
Laser Diodes ◽  
Threshold Current ◽  
Multiple Quantum ◽  
Spectral Shifts ◽  
Band Gap Narrowing

We report on the temperature-dependent spectral shifts in low power 670 nm AlGaInP multiple quantum well red laser diodes due to band gap narrowing at room temperatures (5–45 °C). The spectral shift mechanism is explored with a threshold current density of 11.41 kA/cm2 and a good characteristic temperature of 114 K. The photoluminescence peak intensity shifts towards higher wavelengths and the full width at half maximum increases with increase in temperature from 5 to 45 °C. We use a Hamiltonian system considering the effective mass approximation to formulate the carrier concentrations. The band gap narrowing value determined by a simple formula amounts to 59.15 meV and displays N1/3 dependence at higher densities. The carrier density dependence conveys that the redshift of the spectral emission is due to band gap narrowing.

Latest developments in Blue-Violet Laser Diodes grown by Molecular Beam Epitaxy

2004 ◽  
Vol 831 ◽  
Author(s):  
V. Bousquet ◽  
M. Kauer ◽  
K. Johnson ◽  
C. Zellweger ◽  
S.E. Hooper ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Multiple Quantum Well ◽  
Laser Diodes ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Multiple Quantum ◽  
Pulsed Injection ◽  
Current Duration ◽  
Multiple Quantum Well Laser

ABSTRACTWe report on recent results obtained for InGaN multiple quantum well laser diodes grown by ammonia based Molecular Beam Epitaxy. The laser diodes were grown on freestanding GaN substrates and operated at room temperature under pulsed current injection conditions. For devices with improved p-type doping a threshold current density of 6.7kA.cm−2 was measured for a current pulse duration of 200ns and an operating temperature of 3.9°C. A duty cycle up to 50% with a pulsed injection current duration of 500μs was also achieved at 3.9°C.

scholarly journals Performance characteristics of cw InGaN multiple-quantum-well laser diodes

2000 ◽  
Vol 639 ◽  
Author(s):  
Michael Kneissl ◽  
William S. Wong ◽  
Chris. G. Van de Walle ◽  
John E. Northrup ◽  
David W. Treat ◽  
...  
Keyword(s):  
Quantum Well ◽  
Continuous Wave ◽  
Multiple Quantum Well ◽  
Laser Diodes ◽  
Chemical Vapor ◽  
Performance Characteristics ◽  
Multiple Quantum ◽  
Quantum Well Laser ◽  
Lift Off ◽  
Multiple Quantum Well Laser

ABSTRACTThe performance characteristics are reported for continuous-wave (cw) InGaN multiple-quantum-well laser diodes grown on epitaxially laterally overgrown GaN on sapphire substrates by metalorganic chemical vapor deposition. Room-temperature cw threshold currents as low as 41mA with operating voltages of 6.0V were obtained. The emission wavelength was near 400 nm with output powers greater than 20 mW per facet. Under cw conditions laser oscillation was observed up to 90°C. A significant reduction in thermal resistance was observed for laser diodes transferred from sapphire onto Cu substrates by excimer laser lift-off, resulting in increased cw output power of more than 100mW.

Integration of InxGa1−xN Laser Diodes with Dissimilar Substrates by Laser Lift-off

2000 ◽  
Vol 639 ◽  
Author(s):  
William S. Wong ◽  
Michael Kneissl ◽  
Ping Mei ◽  
David W. Treat ◽  
Mark Teepe ◽  
...  
Keyword(s):  
Indium Gallium Nitride ◽  
Continuous Wave ◽  
Multiple Quantum Well ◽  
Laser Diodes ◽  
Light Output ◽  
Multiple Quantum ◽  
Maximum Output ◽  
Thermal Impedance ◽  
Indium Gallium ◽  
Lift Off

ABSTRACTContinuous-wave (cw) indium-gallium nitride (InGaN) multiple-quantum-well (MQW) laser diodes (LDs) were successfully transferred from sapphire onto copper and diamond substrates using a two-step laser lift-off (LLO) process. Reduced threshold currents and increased differential quantum efficiencies were measured for LDs on Cu due to a 50% reduction of the thermal impedance. Light output for LDs on Cu was three times greater than comparable LDs on sapphire with a maximum output of 30 mW. Increased light output for LDs on diamond were also measure with a maximum output of 80 mW.

InGaN Laser Diodes Grown on SiC Substrate Using Low-Pressure Metal-Organic Vapor Phase Epitaxy

1997 ◽  
Vol 482 ◽  
Author(s):  
A. Kuramata ◽  
K. Domen ◽  
R. Soejima ◽  
K. Horino ◽  
S. Kubota ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Multiple Quantum Well ◽  
Laser Diodes ◽  
Low Pressure ◽  
Threshold Current ◽  
Vapor Phase Epitaxy ◽  
Multiple Quantum ◽  
Magnesium Doping ◽  
Organic Vapor ◽  
Metal Organic

AbstractWe report the crystal growth and the characteristics of InGaN multiple quantum well (MQW) laser diodes grown on a 6H-SiC substrate using a low-pressure metalorganic vapor phase epitaxy (LP-MOVPE). We discuss the buffer layer, the control of InGaN and AlGaN alloy composition, the magnesium doping of GaN and AlGaN, and the characteristics of the MQW structure. We also demonstrate the room-temperature pulsed operation of the laser diode. The threshold voltage was reduced to 15 V by improving the p-contact resistance. The threshold current was reduced to 500 mA by changing the MQW structure and employing high reflection coating.

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