Mitsubishi Electric Doubles Chromatic Dispersion Compensation in Tunable Dispersion Compensator
Announcement posted by Mitsubishi Electric Australia 07 Feb 2002
40 Gigabits/Second Optical Transmission in Sight
Mitsubishi Electric Corporation has developed a tunable dispersion compensator with more than twice the chromatic dispersion compensation capability of previous models. This new advance will allow optical communication systems to offer transmission speeds of more than 40 gigabits/second, and is particularly well suited to overland optical systems.
Chromatic dispersion, the speed of a given optical signal within an optical fiber is dependent on its wavelength. This phenomenon is a main cause of deterioration in signal quality, explained Kiichi Yoshiara, head researcher at Mitsubishi Electrics Advanced Technology R&D Center.
While maintaining the low group delay ripple characteristics that allow favorable transmission properties to be attained at 40 gigabits per second, Mitsubishi Electric succeeded in obtaining a tunable chromatic dispersion range of 200ps/nm. This step forward has made it possible to compensate even for the chromatic dispersion encountered when using overland optical systems.
Systems transmitting at 40 gigabits per second are now within reach, Yoshiara asserted, the new technology operates reliably within a temperature range of 5C to 65C. Commercialization is now very much in the cards thanks to this superlative performance.
Much research in the field of optical communications systems currently focuses on ways of increasing the transmission speeds of single waves. However, chromatic dispersion-induced waveform distortion increases in proportion to the square of the transmission speed. As such, the higher transmission speeds become, the greater the need for compensatory technology.
Moreover, environmental factors such as changes in temperature and tidal and wind effects also exacerbate chromatic dispersion problems. Compensation systems capable of generating and responding to automatic feedback about these and other relevant
conditions are now essential. Hence Mitsubishi Electrics resolve to develop an all-in-one solution to these pressing technical issues.
Last year saw the companys efforts rewarded by the development of a tunable dispersion compensator that incorporates chirped fiber grating*1 and a divided thin film heater. This success was announced at the Optical Fiber Communication Conference held in March 2001. The latest development represents a further advance over last years offering.
*1 Chirping fiber grating: Fiber grating which periodically changes the refractive index of an optical fiber in the direction of transmission, and which gradually changes the period between changes.
Technical Summary
-Twice the chromatic dispersion compensatory capability of previous models.
-Chromatic dispersion range of 200ps/nm.
-Compatible with 40 gigabit/second transmission systems.
-Operates at temperature range of 5C to 65C.
-Incorporates chirped fiber grating and a divided thin film heater.
Chromatic dispersion, the speed of a given optical signal within an optical fiber is dependent on its wavelength. This phenomenon is a main cause of deterioration in signal quality, explained Kiichi Yoshiara, head researcher at Mitsubishi Electrics Advanced Technology R&D Center.
While maintaining the low group delay ripple characteristics that allow favorable transmission properties to be attained at 40 gigabits per second, Mitsubishi Electric succeeded in obtaining a tunable chromatic dispersion range of 200ps/nm. This step forward has made it possible to compensate even for the chromatic dispersion encountered when using overland optical systems.
Systems transmitting at 40 gigabits per second are now within reach, Yoshiara asserted, the new technology operates reliably within a temperature range of 5C to 65C. Commercialization is now very much in the cards thanks to this superlative performance.
Much research in the field of optical communications systems currently focuses on ways of increasing the transmission speeds of single waves. However, chromatic dispersion-induced waveform distortion increases in proportion to the square of the transmission speed. As such, the higher transmission speeds become, the greater the need for compensatory technology.
Moreover, environmental factors such as changes in temperature and tidal and wind effects also exacerbate chromatic dispersion problems. Compensation systems capable of generating and responding to automatic feedback about these and other relevant
conditions are now essential. Hence Mitsubishi Electrics resolve to develop an all-in-one solution to these pressing technical issues.
Last year saw the companys efforts rewarded by the development of a tunable dispersion compensator that incorporates chirped fiber grating*1 and a divided thin film heater. This success was announced at the Optical Fiber Communication Conference held in March 2001. The latest development represents a further advance over last years offering.
*1 Chirping fiber grating: Fiber grating which periodically changes the refractive index of an optical fiber in the direction of transmission, and which gradually changes the period between changes.
Technical Summary
-Twice the chromatic dispersion compensatory capability of previous models.
-Chromatic dispersion range of 200ps/nm.
-Compatible with 40 gigabit/second transmission systems.
-Operates at temperature range of 5C to 65C.
-Incorporates chirped fiber grating and a divided thin film heater.