Ultra-high linearized optical modulator

Details Ultra-high linearized optical modulator Ultra-high linearized optical modulator

2005-09-13

2005-09-13

Dang, Hung Xuan (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C385S002000, C385S008000

Reexamination Certificate

active

06943931

ABSTRACT:
The invented modulator provides ultra-high linearity (SFDR=147 dB-Hz), high tolerance, low loss, simple architecture, and low cost. It is based on unique combination of phase-modulator (PM) and ring resonator (RR) that are coupled to the arm(s) of standard Mach-Zehnder interferometer (MZI) configuration. It comprises of input port to receive optical signal1, optical power separating means2, interferometer arm length paths3&4, bias controller mean5, PM6, RR7with coupler17having coefficient δ, optical power combining means8, RF power splitting means9, RF power source10, and optical output signal15. Both PM6and RR7are driven by same RF source10whose output power is divided into two parts with a split ratio of F:(1-F). The role of RR7is to provide the necessary non-linear phase-correction. It operates under non-resonance condition to avoid bandwidth narrowing. The dual modulation of PM6and RR7is an important factor in this invention.

REFERENCES:
patent: 5148503 (1992-09-01), Skeie
patent: 5327279 (1994-07-01), Farina
patent: 5768378 (1998-06-01), Townsend et al.
patent: 5850305 (1998-12-01), Pidgeon
patent: 6246500 (2001-06-01), Ackerman
patent: 2003/0020985 (2003-01-01), LaGasse et al.
Y. Chiu, et al. “Broad-Band Electronic Linearizer for Externally Modulated Analog Fiber-Optic Links,” Photonics Techn. Letters vol. 11, No. 1 Jan. 1999.
R. Sadhwani, et al. “Adaptive Electronic Linearization for Fiber,” OFC 2003 vol. 2, pp. 477-479.
M. Nazarathy, et al., “Progress in external modulated AM CATV transmission systems”, J. Lightwave Technol., vol. 11, pp. 82-105, Jan. 1993.
J. Schaffner, “Spur-Free Dynamic Range Measurements of a Fiber Optic Link . . . Wave Linearized Directional Coupler Modulators,” Phon. Tech. Lett., vol. 6, 1994, pp. 273-275.
C.H. Bulmer, et al., “Linear 0-20 GHz Modulation with a 1×2 Directional Coupler,” Photonics Technology Letters, vol. 3, No. 1, Jan. 1991, pp. 28-30.
M. L. Farwell, et al., “An Electrooptic Intensity Modulator with Improved Linearity”Photonics. Techn. Letters, vol. 3 No. 9, Sep. 1991, pp. 792-795.
G. Kanter, P. Capofreddi, S. Behtash, A. Gandhi, “Electronic Equalization for Extending the Reach of Electro-Absorption Modulator ,” OFC 2003, vol. 2, pp. 476-477.
L.M. Johnson and H.V. Roussell “Reduction of intermodulation distortion in interferometric optical modulators,” Optics Letters vol. 13, No. 10, Oct. 1988, pp. 928-930.
Edward I. Ackerman “Broad-Band Linearization of a Mach-Zehnder Electro optic Modulator,” IEEE Trans. on Microwave Theory and Techniques, vol. 47, No. 12, 1999, pp. 2271-2279.
A. Loayssa, et al., “Linearization of Electro optic Modulators at Millimeter-wave Frequencies,” 1999 LEOS 12th Annual Meeting Proceeding vol. 1, pp. 275-276.
William K. Burns, “Linearized Optical Modulator with Fifth Order Correction” Journal of Lightwave Technology, vol. 13 No. 8, 1995, pp. 1724-1727.
S. K. Korotky, et al., “Dual Parallel Modulation Schemes for Low-for Low-Distortion Analog Optical Transmission,” IEEE J. on Sel. Areas in Comm., vol. 8 No. 7, 1990, pp. 1377-1381.
W. Bridges, and J. Schaffner, “Distortion in Linearized Electro optic Modulators,” IEEE Trans. on Microwave Theory and Techniques, vo.43 No. 9, Sep. 1995, pp. 2184-2197.
N. Rengand, et al., “Novel Design for the Broadband Linearized Optical Intensity Modulator,” IEEE Military Comm. Conference. MILCOM 2003. vol. 2, 13-16, 2003, pp. 1208-1212.
Xiaobo Xie, Jacob Khurgin, Jin Kang, and Fow-San Chow, “Linearized Mach-Zehnder Intensity Modulator,” IEEE Photonics Technology Letters, vol. 15 No. 4, 2003, pp. 531-533.
Dingel and Izutsu, “Multifunction optical filter with a Michelson-Gires-Toumois . . . system applications,” Optic Letters,, 1998, vol. 23, No. 14, pp. 1098-1101.
G.E. Betts, et al., “Optimization of externally modulated analog links,” Devices for Optical Processing, D.M. Gookin, Ed. Proc. SPIE vol. 1562, pp. 2, pp. 281-302, 1991.

Affiliated with

Also associated with

Rating

Ultra-high linearized optical modulator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ultra-high linearized optical modulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultra-high linearized optical modulator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3441338