Optical Waveguide Arrangements Comprising An Auxiliary Waveguide - Like Structure
Granted: August 29, 2013
Application Number:
20130223790
An optical waveguide arrangement is provided which comprises an active ridge waveguide structure 12 formed by etching of a semiconductor substrate 1, 2, 3. There is also provided an auxiliary waveguide-like structure 8 formed on the substrate adjacent the active ridge waveguide structure 12 to control the etched profile of the active waveguide structure. The arrangement of the auxiliary structure 8 on the substrate controls the etched profile over the cross-section of the active…
OPTICAL SEMICONDUCTOR MODULATOR DEVICE AND OPTICAL MODULE
Granted: August 15, 2013
Application Number:
20130209021
In an optical semiconductor device related to the present invention, a first light source outputting light having a first polarization, a second light source outputting light having a second polarization, a first optical modulator being optically connected to an output side of the first light source and modulating the light that is output from the first light source to output a light signal, a second optical modulator being optically connected to an output side of the second light source…
OPTICAL SEMICONDUCTOR DEVICE
Granted: August 15, 2013
Application Number:
20130208751
In a BH laser which uses InGaAlAs-MQW in an active layer, Al-based semiconductor multi-layer films including an InP buffer layer and an InGaAlAs-MQW layer, and an InGaAsP etching stop layer are formed in a mesa shape, and a p type InP burial layer is buried in side walls of the mesa shape. An air ridge mesa-stripe of a lateral center that is substantially the same as that of the mesa shape is formed on the mesa shape. According to the present structure, a leakage current can be…
Electro-optic Devices
Granted: August 8, 2013
Application Number:
20130202243
An electro-optic device 200 comprising a substrate in which first and second waveguides 202, 203 are formed. The device also comprises first and second electrodes 204, 205 comprising an optically transparent conductive material and including primary portions 204a, 205a overlying the first and second waveguides 202, 203 for electrically biasing the first and second waveguides. The device is configured such that one of the first and second electrodes includes one other portion 204b, 205b…
SEMICONDUCTOR LASER
Granted: July 18, 2013
Application Number:
20130182735
An aluminium gallium indium phosphide (AlGaInP)-based semiconductor laser device is provided. On a main surface of a semiconductor substrate formed of n-type GaAs (gallium arsenide), from the bottom layer, an n-type buffer layer, an n-type cladding layer formed of an AlGaInP-based semiconductor containing silicon (Si) as a dopant, an active layer, a p-type cladding layer formed of an AlGaInP-based semiconductor containing magnesium (Mg) or zinc (Zn) as a dopant, an etching stopper layer,…
Fast Wavelength Switching
Granted: July 18, 2013
Application Number:
20130182731
There is described a laser assembly for providing light at a switchable output wavelength. The assembly comprises first and second tuneable lasers, each configurable to emit light at a laser wavelength chosen from a range of wavelengths. Light is transmitted from the first laser while the second laser is retuned to change the chosen laser wavelength thereof. Each laser comprises one or more thermally sensitive control components for controlling the operation of the laser and an…
Monitoring and Controlling Optical Nodes
Granted: July 4, 2013
Application Number:
20130170828
A method and apparatus for monitoring and controlling an optical node 100. The optical node 100 including one or more optical components 120, 121 or 122 connected by optical fibre carrying an optical signal 102. The optical signal 102 including a plurality of optical channels. A set of measurement sequences is determined, each measurement sequence defining a set of optical channels from the plurality of optical channels and a measuring sequence for measuring an optical property of the…
Printed Circuit Board and Optical Transmission Device
Granted: June 27, 2013
Application Number:
20130163996
A printed circuit board includes a substrate, a signal output circuit formed on the substrate for outputting a clock signal, a shield for covering the signal output circuit, a power supply wiring for connecting the signal output circuit and a power source, and a trap filter provided to the power supply wiring and provided inside the shield, for attenuating a frequency component corresponding to a frequency of clock signal. The trap filter includes a resonance circuit having one portion…
OPTICAL MODULE
Granted: June 27, 2013
Application Number:
20130161497
An optical module includes a light-receiving element configured to convert an incident optical signal to an electric signal. The light-receiving element includes a mesa part configured to laminate at least a first semiconductor layer, a light absorption semiconductor layer that absorbs an optical signal entering from a light reception surface, and a second semiconductor layer. The light-receiving element also includes an electrode part disposed on a top of the mesa part and a wiring part…
RECEIVER MODULE AND DEVICE
Granted: June 13, 2013
Application Number:
20130147002
Provided is a receiver module, including: a semiconductor light receiving element including an electrode; and a sub-mount including: an electrical wiring joined to the electrode with solder; and a trap region arranged around a joining surface of the electrical wiring, the trap region retaining solder by solder wetting.
ENCLOSURE FOR A LASER PACKAGE
Granted: May 9, 2013
Application Number:
20130114629
An enclosure for a laser package the enclosure being configured to receive a laser component within the enclosure, and further configured to receive for a driver integrated circuit (IC) (34) on the exterior of the enclosure, wherein the enclosure comprises first external electrical contacts (52) electrically connected to respective first IC electrical contacts (60), and second IC electrical contacts (62) electrically connected to respective first internal electrical contacts (64),…
High Power Semiconductor Laser Diodes
Granted: April 18, 2013
Application Number:
20130092722
A high power laser source comprises a bar of laser diodes having a first coefficient of thermal expansion CTEbar on a submount having a second coefficient CTEsub and a cooler having a third coefficient CTEcool. The submount/cooler assembly shows an effective fourth coefficient CTEeff differing from CTEbar. This difference leads to a deformation of the crystal lattice of the lasers' active regions by mechanical stress. CTEeff is selected to be either lower than both CTEbar and CTEcool or…
OPTICAL MODULE AND CAGE
Granted: March 28, 2013
Application Number:
20130077920
An optical module includes an electromagnetic wave absorption member. The electric connection member includes a floating portion which is in a floating state spaced apart from the housing and at a position away from a mounting portion by which the electric connection member is mounted on the housing in the direction opposite to the direction that the optical module is inserted into a cage. At least a portion of the electromagnetic wave absorption member is arranged between the housing…
HOMOGENIZATION OF FAR FIELD FIBER COUPLED RADIATION
Granted: March 7, 2013
Application Number:
20130058124
Optical systems and components thereof are disclosed which may be used for efficiently coupling laser energy into an optical conduit while maintaining a homogenous beam output from the optical conduit. Some embodiments are directed more specifically to far field beam homogenization of optical fiber coupled radiation.
OPTICAL DEVICE, OPTICAL MODULE, AND METHOD FOR MANUFACTURING OPTICAL DEVICE
Granted: February 28, 2013
Application Number:
20130051725
An optical device includes a substrate and a first optical waveguide including a mesa. The mesa includes a first lower clad layer portion, a first core layer portion, and a first upper clad layer portion. The first lower clad layer portion, the first core layer portion, and the first upper clad layer portion are disposed in this order from the substrate side. The optical device also includes a first etch stop layer configured to stop etching when the first optical waveguide is formed.…
REDUCED LENGTH OPTOELECTRONIC DEVICES
Granted: February 7, 2013
Application Number:
20130034328
There is described an optoelectronic device having a housing and a chip housed by the housing. At least a portion of the chip protrudes through an aperture in a wall of the housing. There is further provided an optoelectronic module comprising such an optoelectronic device and electronic control circuitry adapted to control the operation of the optoelectronic device.
WAVELENGTH SELECTIVE SWITCH WITH MULTIPLE INPUT/OUTPUT PORTS
Granted: January 31, 2013
Application Number:
20130028556
A multi-port wavelength selective switch includes a one dimensional array of input and output ports. The multi-port wavelength selective switch further includes a wavelength dispersive element configured to receive input optical signals from the input ports, and to disperse wavelength components thereof. Additionally, the multi-port wavelength selective switch includes an array of beam steering devices. Each beam steering device is controllable to a position at which the beam steering…
GAIN CONTROL FOR AN OPTICAL MODULATOR
Granted: January 24, 2013
Application Number:
20130022306
There is described an optical modulation system for transmitting modulated optical light. The system comprises an electro-optic modulator having at least two arms through which light is transmitted and an imbalance electrode located on at least one arm. A current source is configured to inject current into the imbalance electrode for modifying the phase of light passing through the arm. A dither generator is configured to modulate the injected current, or bias voltage applied to at least…
ALIGNMENT OF A DATA SIGNAL TO AN ALIGNMENT SIGNAL
Granted: November 22, 2012
Application Number:
20120294622
The present invention provides a method and apparatus for phase aligning two optical signals within an optical transmitter to each other (and, in some embodiments, to a pulse carved optical signal) using integrated complimentary taps and a dither signal. The phase of a first signal may be intentionally offset relative to the phase of a second signal. Based on the offset, a correction factor may be calculated. The correction factor may be used to shift the phase of the first signal and/or…
VCSEL WITH NON-CIRCULAR MESA AND CURRENT CONFINEMENT APERTURE FOR HIGHER-ORDER LATERAL MODE EMISSION
Granted: July 21, 2011
Application Number:
20110176572
A vertical cavity surface emitting laser (VCSEL) (100) has a substrate (104), on which are disposed first and second distributed Bragg reflectors (DBRs) (106, 112), each DBR comprising a stack of layers of alternating refractive index, an active layer (108) disposed between the DBRs, and an aperture layer (110) disposed either between the DBRs or within one of the DBRs. The aperture layer (110) has a border (116) having an internal boundary with a plurality of indented portions defining…
