Broadband absorber having multiple quantum wells of different th

Details Broadband absorber having multiple quantum wells of different th Broadband absorber having multiple quantum wells of different th

1992-02-05

1993-11-23

Davie, James W.

Coherent light generators

Particular beam control device

Q-switch

359245, 372 18, 372 20, 372 25, H01S 310

Patent

active

052651070

ABSTRACT:
A saturable absorber comprising multiple quantum-well layers (32, 34, 36) of differing thicknesses and separated by barrier layers (38) so as to produce a wide-band absorption. Such a saturable absorber (30) is useful in a hybrid mode-locked laser having an optical cavity defined by two mirrors (10, 12) into which are placed the saturable absorber (30) and an optical amplifier (14) driven by both a DC bias and an RF modulation signal.

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patent: 5119227 (1992-06-01), Dawson et al.
G. A. Alphonse et al., "High-Power Superluminescent Diodes," IEEE Journal of Quantum Electronics, Dec. 12, 1988, vol. 24, pp. 2454-2457.
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A. M. Weiner et al., "Picosecond and femtosecond Fourier pulse shape synthesis," Revue Physique Applique, Dec. 1987, vol. 22, pp. 1619-1628.
P. J. Delfyett et al., "Generation of subpicosecond high-power optical pulses frm a hybrid mode-locked semiconductor laser," Optics Letters, Dec. 1, 1990, vol. 15, No. 23, pp. 1371-1373.
Y. Silberberg et al., "Subpicosecond Pulses from a Mode-Locked Semiconductor Laser," IEEE Journal of Quantum Electronics, Jun. 6, 1986, vol. QE-22, pp. 759-761.
E. Yablonovitch et al., "Extreme selectivity in the lift-off of epitaxial GaAs films," Applied Physics Letters, Dec. 28, 1987, vol. 51, pp. 2222-2224.

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