Browsing by Author "WYNN, JD"

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CONTINUOUS-WAVE VISIBLE INGAP/INGAALP QUANTUM-WELL SURFACE-EMITTING LASER-DIODES
(1993-11-01)
HUANG, KF
;
TAI, K
;
WU, CC
;
WYNN, JD
;
電子物理學系
CONTINUOUS-WAVE VISIBLE INGAP/INGAALP QUANTUM-WELL SURFACE-EMITTING LASER-DIODES
(1993-07-22)
TAI, K
;
HUANG, KF
;
WU, CC
;
WYNN, JD
;
電子物理學系
Vertical cavity top surface emitting lasers in the 0.66 mum visible spectral region were fabricated by the metal-organic chemical vapour deposition technique. The continuous wave threshold currents I(th) are 3.9 and 4.6 mA at -75 and -25-degrees-C, respectively, for 15 mum diameter devices. The lasers can also be operated at room temperature, but only in a pulsed mode with an I(th) of 12 mA at 25-degrees-C.
CONTINUOUS-WAVE VISIBLE INGAP/INGAALP QUANTUM-WELL SURFACE-EMITTING LASER-DIODES
(1993-07-22)
TAI, K
;
HUANG, KF
;
WU, CC
;
WYNN, JD
;
電子物理學系
Vertical cavity top surface emitting lasers in the 0.66 mum visible spectral region were fabricated by the metal-organic chemical vapour deposition technique. The continuous wave threshold currents I(th) are 3.9 and 4.6 mA at -75 and -25-degrees-C, respectively, for 15 mum diameter devices. The lasers can also be operated at room temperature, but only in a pulsed mode with an I(th) of 12 mA at 25-degrees-C.
CONTINUOUS-WAVE VISIBLE INGAP/INGAALP QUANTUM-WELL SURFACE-EMITTING LASER-DIODES
(1993-01-01)
HUANG, KF
;
TAI, K
;
WU, CC
;
WYNN, JD
;
電子物理學系
INSTABILITY IN SURFACE EMITTING LASERS DUE TO EXTERNAL OPTICAL FEEDBACK
(1993-01-01)
CHEN, HM
;
TAI, K
;
HUANG, KF
;
KAO, YH
;
WYNN, JD
Instability in the output of dc-biased surface emitting lasers due to an external cavity effect was observed. The output power spectrum exhibited multiple peaks with spacing corresponding to exactly the round-trip delay in silica fibers with length ranging from 2 m to 2 km. The magnitude of the peaks was enhanced in the spectral region centered at the laser relaxation frequency. With increased feedback, the background of the output spectrum was found to increase, indicating the presence of optical chaos. Numerical simulation based on the rate equation analysis was found to agree with the experiment, indicating the surface emitting lasers are well described by the rate equation and are susceptible to feedback as the edge emitting lasers.
VISIBLE INGAP/LNGAAIP QUANTUM-WELL TOP SURFACE-EMITTING LASER-DIODES
(1993-11-15)
TAI, KC
;
HUANG, KF
;
WU, CC
;
WYNN, JD
;
電子物理學系
Vertical cavity top surface emitting lasers emitting near 0.67 mu m visible spectral region were fabricated by one-step low pressure metalorganic vapor phase deposition technique. The lasers used four 80-Angstrom-thick InGaP/InGaAlP quantum wells active region, sandwiched between two Al0.5Ga0.5As/AlAs distributed Bragg reflectors. Room temperature pulsed threshold current was 10 mA for 15 mu m diam devices.