Coherent light generators – Particular resonant cavity – Distributed feedback
Patent
1996-03-22
1998-12-22
Bovernick, Rodney B.
Coherent light generators
Particular resonant cavity
Distributed feedback
372 45, H01S 308, H01S 319
Patent
active
058526250
ABSTRACT:
The gain coupled distributed feedback semiconductor laser includes an active layer and a diffraction grating which is provided in the vicinity of the active layer and has a plurality of light absorption layer periodically arranged along a resonator length direction. A relationship among energy h.nu. (h is Planck's constant, and .nu. is a frequency of induced emission light), forbidden band width E.sub.g of the light absorption layer, and energy band width .delta.E where free electrons are thermally distributed satisfies h.nu..gtoreq.E.sub.g +.delta.E.
REFERENCES:
patent: 5363399 (1994-11-01), Yagi
patent: 5539766 (1996-07-01), Ishino et al.
Luo et al., "Gain-coupled distributed feedback semiconductor lasers with an absorptive conduction-type inverted grating" IEEE Phototonics Technology Letters (1992) 4(7):127-130. (Jul. 1992).
Nakano et al., "Facet reflection independent, single longitudinal mode oscillation in a GaAlAs/GaAs distributed feedback laser equipped with a gain-coupling mechanism" Appl. Phys. Lett. (1989) 55(16):1606-1608. (Oct. 1989).
Shibata et al., "2.5Gb/s, 100km transmission characteristics of gain-coupled DFB laser diode" National Convention of the Institute of Electronics, Information and Communication Engineers of Japan, C-342 (1995) p. 342. A partial English translation also included herewith. (no month).
Borchert et al., "1.55.mu.m gain-coupled quantum-well distributed feedback lasers with high single-mode yield and narrow linewidth" IEEE Transactions Photonics Technology Letters (1991) 3(11):955-957. (no month available).
Bovernick Rodney B.
Phan Luong-Quyen T.
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