Title:
TUNABLE SEMICONDUCTOR LASER HAVING A CAVITY WITH WAVELENGTH SELECTIVE MIRROR AND MACH-TEHNDER INTERFEROMETER
Document Type and Number:
WIPO Patent Application WO2002054544
Kind Code:
A3
Abstract:
The semiconductor laser has a resonance cavity composed of a gain chip, a MachZehnder wide tuning port, and a wavelength-selective mirror component formed either as a ring resonator or a reflective Fabry-Perot etalon. Optical signals generated by the gain chippropagate through the wide tuning port and into the wavelength-selective mirror component and are then reflected back to the gain chip. The wavelength-selective mirror component is configured to relfect only those optical signals having wavelengths within a set of sharp peaks so that the laser cavity resonates only within the sharp peaks. The wavelenght-selective mirror component is heated to adjust internal dimensions to maintain one of the sharp peaks at a selected emission wavelength. As optical signals pass through the wide tuning port, the signals are split between two channels of differing lengths resulting in optical interference. The optical interference limits the ability of the laser cavity to resonate at wavelengths other than near the center of a single broad peak determined by the relative lengths of the two channels. The wide tuning port is heated to vary the relative lengths of the two channels to maintain the single broad peak at the selected transmission wavelength. In this manner, the laser cavity is controlled to resonate substantially only at the single selected wavelength. Resonance at any of the other wavelengths reflected by the wavelength-selective mirror component is greatly limited, thereby significantly reducing transmission sidebands generated by the laser. Specific implementations of the ring resonator mirror and the reflective etalon are described.
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Inventors:
KSENDZOV ALEXANDER (US)
MAY RANDY DEAN (US)
MAY RANDY DEAN (US)
Application Number:
PCT/US2001/049591
Publication Date:
September 04, 2003
Filing Date:
December 28, 2001
Export Citation:
Assignee:
FIBERSPACE INC (US)
KSENDZOV ALEXANDER (US)
MAY RANDY DEAN (US)
KSENDZOV ALEXANDER (US)
MAY RANDY DEAN (US)
International Classes:
H01S5/14; H01S5/0687; H01S5/10; (IPC1-7): H01S5/14; H01S5/026; H01S5/40; H04B10/14
Foreign References:
| EP0516044A2 | 1992-12-02 | |||
| EP0534305A1 | 1993-03-31 | |||
| US6101210A | 2000-08-08 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 013, no. 207 (E - 758) 16 May 1989 (1989-05-16)
MOELLER S ET AL: "TUNING PERFORMANCE AND SPECTRAL SELECTIVITY OF WIDELY TUNABLE VERTICAL MACH-ZEHNDER LASERS", IEEE JOURNAL OF QUANTUM ELECTRONICS, IEEE INC. NEW YORK, US, vol. 36, no. 2, February 2000 (2000-02-01), pages 192 - 197, XP000908292, ISSN: 0018-9197
"COHERENT TRANSMISSION TECHNOLOGY", LASER FOCUS, PENNWELL PUBLISHING CO. TULSA, US, vol. 21, no. 11, 1 November 1985 (1985-11-01), pages 98, XP000711871
INOUE K ET AL: "WAVELENGTH CONVERSION USING A LIGHT INJECTED DFB-LD AND A MACH-ZEHNDER FILTER WITH A RING RESONATOR", IEEE PHOTONICS TECHNOLOGY LETTERS, IEEE INC. NEW YORK, US, vol. 7, no. 9, 1 September 1995 (1995-09-01), pages 998 - 1000, XP000527500, ISSN: 1041-1135
MOELLER S ET AL: "TUNING PERFORMANCE AND SPECTRAL SELECTIVITY OF WIDELY TUNABLE VERTICAL MACH-ZEHNDER LASERS", IEEE JOURNAL OF QUANTUM ELECTRONICS, IEEE INC. NEW YORK, US, vol. 36, no. 2, February 2000 (2000-02-01), pages 192 - 197, XP000908292, ISSN: 0018-9197
"COHERENT TRANSMISSION TECHNOLOGY", LASER FOCUS, PENNWELL PUBLISHING CO. TULSA, US, vol. 21, no. 11, 1 November 1985 (1985-11-01), pages 98, XP000711871
INOUE K ET AL: "WAVELENGTH CONVERSION USING A LIGHT INJECTED DFB-LD AND A MACH-ZEHNDER FILTER WITH A RING RESONATOR", IEEE PHOTONICS TECHNOLOGY LETTERS, IEEE INC. NEW YORK, US, vol. 7, no. 9, 1 September 1995 (1995-09-01), pages 998 - 1000, XP000527500, ISSN: 1041-1135
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