Optical waveguides – Planar optical waveguide – Thin film optical waveguide
Patent
1996-06-17
1998-09-08
Ngo, John
Optical waveguides
Planar optical waveguide
Thin film optical waveguide
385 46, 385 14, 372 50, 372 48, G02B 610
Patent
active
058057552
ABSTRACT:
An opto-electronic integrated circuit including an active ridge waveguide (60), for example, a semiconductor laser diode, and a passive buried heterostructure semiconductor waveguide (64). The two types of waveguides are chosen for their respective tasks so as to minimize the lasing wavelength dependencies arising from fabricational variations and to simultaneously reduce the allowable bending radius, thus reducing the chip size. The two waveguides are coupled by a transition structure (62) including a laterally undefined slab waveguide. A fabricational method is described that self-aligns the ridge and buried heterostructure waveguides so that the transition loss is negligible. The method can be integrated with the fabrication of a window facet (118', 118") between an end of the ridge waveguide and the chip edge, which prevents unintended back reflections from the chip edge.
REFERENCES:
patent: 4809288 (1989-02-01), Welch et al.
patent: 5541945 (1996-07-01), Yamaguchi et al.
Amersfoort et al., "Wavelength Accuracy and Output Power of Multiwavelength DFB Laser Arrays with Integrated Star Couplers and Optical Amplifiers," Integrated Photonics Research, Apr. 29-May 2, 1996, Boston, Massachusetts, 1996 Technical Digest Series, vol. 6, pp. 478-481.
Brackett et al, "A scalable multiwavelength multihop optical network: a proposal for research on all-optical networks," Journal of Lightwave Technology, vol. 11, pp. 736-753, 1993.
Cha et al., "1.5.mu.m band travelling-wave semiconductor optical amplifiers with window facet structure," Electronics Letters, vol. 25, 1989, pp. 242, 243.
Olsson et al., "Polarisation-independent optical amplifier with buried facets," Electronics Letters, vol. 25, 1989, pp. 1048, 1049.
Utaka et al., "Effect of Mirror Facets on Lasing Characteristics of Distributed Feedback InGaAsP/InP Laser Diodes at 1.5 .mu.m Range," IEEE Journal of Quantum Electronics, vol. QE-20, 1984, pp. 236-245.
Young et al., "A 16.times.1 Wavelength Division Multiplexer with Integrated Distributed Bragg Reflector Lasers and Electroabsorption Modulators," IEEE Photonics Technology Letters, vol. 5, pp. 908-910, 1993.
Zah et al., "Multiwavelength Light Source with Integrated DFB Laser Array and Star Coupler for WDM Lightwave Communications," International Journal of High Speed Electronics and Systems, vol. 5, No. 1, pp. 91-109, 1994.
Zah et al., "Monolithic integrated multiwavelength laser arrays for WDM lightwave systems," Journal of Optoelectronics--Devices and Technology, vol. 9, pp. 153-166, 1994.
Zah et al., "Monolithic integration of a multiwavelength compressive-strained multiquantum-well distributed-feedback laser array with a star coupler and optical amplifiers," Electronics Letters, vol. 28, pp. 2361, 2362, 1992.
Zah et al., InP-Based Multiwavelength Laser Arrays with Integrated Combiners for WDM Systems, Proceedings: IEEE Lasers and Electro-Optics Society, 1995 Annual Meeting, San Francisco, California, Oct. 30-Nov. 2, 1995, vol. 2, pp. 239, 240.
Zah et al., "High Performance Multiwavelength Integrated DFB Laser Array," Proceedings of Fifth Biennial DoD Photonics Conference, McLean, Virginia, Mar. 26-28, 1996, pp. 167-170.
Amersfoort Martin
Zah Chung-en
Guenzer Charles S.
Ngo John
Tellium Inc.
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