Abstract:
High-speed modulation over 22 GHz for waveguided InGaAlAs/InAlAs multiple quantum well (MQW) optical modulators is described. A large on/off ratio of over 25 dB is demons...Show MoreMetadata
Abstract:
High-speed modulation over 22 GHz for waveguided InGaAlAs/InAlAs multiple quantum well (MQW) optical modulators is described. A large on/off ratio of over 25 dB is demonstrated with a low-drive voltage (6 V) operating in the 1.55- mu m wavelength region. The design and characteristics of MQW p-i-n modulators are discussed. The causes of large-insertion loss and the required drive voltage bandwidth figure of merit for the MQW modulator are discussed. The frequency response measurements show that the response speed is limited by the RC time constant of the device. This suggests that the speed can be further enhanced by decreasing the size and capacitance of the device.<>
Published in: Journal of Lightwave Technology ( Volume: 8, Issue: 7, July 1990)
DOI: 10.1109/50.56402
Citations are not available for this document.
Cites in Patents (4)Patent Links Provided by 1790 Analytics
1.
AVERBECK, Robert; STEGMÜLLER, Bernhard, "DEVICE FOR OPTICAL SIGNAL TRANSMISSION, METHOD FOR OPTICAL SIGNAL TRANSMISSION AND OPTICAL MODULATOR"
Inventors:
AVERBECK, Robert; STEGMÜLLER, Bernhard
Abstract:
The invention relates to a device for optical signal transmission comprising a laser element, a semi-conductor element arranged in the direction of emission having a third energy level which is located between a first and a second energy level, and means for applying an electric field. When an electric field is applied, light can be emitted by absorption of the light emitted by the laser element in a second direction of emission.
Assignee:
INFINEON TECHNOLOGIES AG
Filing Date:
18 June 2003
Grant Date:
16 March 2005
Patent Classes:
Current International Class:
H01S0050260000
2.
Miyazaki, Yasunori c/oMitsubishi Denki; Tada, Hitoshi c/oMitsubishi Denki; Hanamaki, Yoshihiko c/oMitsubishi Denki, "Waveguide-type semiconductor optical device and process of fabricating the same"
Inventors:
Miyazaki, Yasunori c/oMitsubishi Denki; Tada, Hitoshi c/oMitsubishi Denki; Hanamaki, Yoshihiko c/oMitsubishi Denki
Abstract:
A waveguide-type semiconductor optical device (20) having a pin-type junction formed on a semi-insulating substrate (1) by a metal-organic vapor phase epitaxial growth process (MOVPE). The pin-type junction consists of an n-type cladding layer (2), an i-type absorption layer (4), and a p-type cladding layer (6). The waveguide-type semiconductor optical device has an impurity concentration not higher than 1016 cm-3 in the i-type absorption layer.
Assignee:
MITSUBISHI DENKI KK
Filing Date:
23 April 2003
Grant Date:
24 March 2004
Patent Classes:
Current International Class:
G02F0010250000
3.
AVERBECK, Robert; STEGM¿LLER, Bernhard, "DEVICE FOR OPTICAL SIGNAL TRANSMISSION, METHOD FOR OPTICAL SIGNAL TRANSMISSION AND OPTICAL MODULATOR"
Inventors:
AVERBECK, Robert; STEGM¿LLER, Bernhard
Abstract:
The invention relates to a device for optical signal transmission comprising a laser element, a semi-conductor element arranged in the direction of emission having a third energy level which is located between a first and a second energy level, and means for applying an electric field. When an electric field is applied, light can be emitted by absorption of the light emitted by the laser element in a second direction of emission.
Assignee:
INFINEON TECHNOLOGIES AG,
INDIVIDUAL PATENTER,
Filing Date:
18 June 2003
Grant Date:
24 December 2003
Patent Classes:
Current International Class:
H01S0050260000
4.
Devaux, Fabrice, "APPARATUS FOR RE SHAPING A TRAIN OF LIGHT PULSES AND APPARATUS FOR RECOVERING A PERIODIC SIGNAL SYNCHRONIZED ON A TRAIN OF MODULATED LIGHT PULSES"
Inventors:
Devaux, Fabrice
Abstract:
Apparatus for reshaping a train of light pulses includes an electro-absorbent modulator to which the train of pulses is applied for the purpose of being resynchronized and reshaped. A periodic signal generator that is adjustable in phase and frequency applies a periodic signal to the modulator to voltage control said modulator. Servo-control means control said generator in phase and in frequency to minimize the mean photocurrent delivered by the modulator while it is both in its absorbent state and receiving a light pulse. The apparatus may also be used to recover a periodic signal that is synchronized on a train of modulated light pulses. The invention is applicable to long distance telecommunications by transmitting soliton pulses along optical fibers.
Assignee:
FRANCE TELECOM
Filing Date:
17 June 1994
Grant Date:
14 January 1997
Patent Classes:
Current U.S. Class:
398181000, 398180000
Current International Class:
H04B0101550000, H04B0100400000
