摘要:
In a multilayer wiring board, a low resistance silicon substrate having a predetermined resistivity and a high resistance silicon substrate having a resistivity higher than the predetermined resistivity are stacked while interposing an insulating layer therebetween. The low resistance silicon substrate is provided with an electric passage part surrounded by a ring-shaped groove, while a wiring film electrically connected to the electric passage part through an opening of the insulating layer is disposed on a rear face of the high resistance silicon substrate and an inner face of a recess. Since the high resistance silicon substrate is thus provided with the wiring film, an optical semiconductor element and an electronic circuit element which differ from each other in terms of the number and positions of electrode pads can be electrically connected to each other on the front and rear face sides of the multilayer wiring board.
摘要:
An optical wiring board by which an optical waveguide can be easily aligned with a light emitting element and a light detecting element. The optical wiring board (1) is provided with a substrate (10). On the substrate (10), a plurality of recessed parts (12) are formed, and the optical waveguide (13) is formed between the recessed parts (12). In the recessed part (12), a light receiving/emitting member (30), which is mounted on an inserting part (22) on a base member (20), is arranged. In the inserting member (22), reflecting planes (26, 27) are formed on inclined planes, and an optical path of the optical waveguide (13) matches with that of a light detecting part (34) and a light emitting part (37) in the light receiving/emitting member (30) via the reflecting planes (26, 27).
摘要:
The present invention relates to a high-frequency signal transmitting optical module which can easily realize a high-frequency signal transmission by use of a semiconductor optical device to which a highly versatile metal can package has been applied. In the high-frequency signal transmitting optical module, after fixing, to a rear surface of a stem of the metal can package, fixing portions of the linear outer leads by laser welding, the end portions of the outer leads are bent. By this, the outer leads can be easily attached to the semiconductor optical device. On both sides of the respective lead pins of the semiconductor optical device, since the outer leads extending along these are attached to the rear surface of the stem, ground regions are continuously provided on both sides of the respective lead pins by the stem and respective outer leads, whereby TEM wave transmission lines are formed. Accordingly, high-frequency signals can be transmitted to the semiconductor optical device.
摘要:
In optical module 10, light emitted from laser diode (hereinafter referred to as “LD”) 42 is collimated into parallel light beam by ball lens 44 and then travels through ball lens 26 to be focused on core 104 of optical fiber 100. Since the light passing between ball lenses 44 and 26 is the parallel light beam as described above, allowance is enlarged for axial misalignment between the optical axes of ball lens 44 and ball lens 26. This enables the light from LD 42 to be focused on core 102 of optical fiber 100 even if there occurs axial misalignment between the optical axes of optical fiber 100 and LD 42 due to a factor resulting from fitting of ferrule 102 into sleeve 14 or the like. Accordingly, there is no need for alignment in a work of mounting optoelectronic device 28, i.e., LD 42 in housing 12.
摘要:
An optical flip-flop circuit which includes an electrical power source for providing an electrical signal, a light-receiving element provided in series with the power source for switching the electrical signal in response to an optical signal, a light-emitting element for emitting the optical signal in response to the electric signal, an electrical signal path between the light-receiving element and the light-emitting element, whereby the electrical signal passes from the power source to the light-emitting element in response to the optical signal received by the light-receiving element, a light path for directing the optical signal from the light-emitting element to the light-receiving element, wherein the light path and the electrical signal path form a signal loop through which a signal circulates, said circulating signal comprising the electrical signal through the electrical signal path portion of the signal loop and the optical signal through the light path portion of the signal loop, and input/output means for providing an input optical signal to the light-receiving element and for emitting a portion of the optical signal directed by the light path.
摘要:
Provided is an infrared image sensor for detecting infrared rays. The infrared image sensor includes a light-receiving unit including a pixel region in which a plurality of pixels are arranged and at least one reference pixel; a difference circuit for acquiring a first differential signal that is a differential signal between a signal of one pixel contained in the pixel region and a signal of the reference pixel and a second differential signal that is a differential signal between signals of two predetermined pixels out of the pixels contained in the pixel region; and a pixel signal calculating unit that calculates a signal of each of the pixels on the basis of the first differential signal and the second differential signal.
摘要:
In a multilayer wiring board 1, a low resistance silicon substrate 2 having a predetermined resistivity and a high resistance silicon substrate 4 having a resistivity higher than the predetermined resistivity are stacked while interposing an insulating layer 3 therebetween. The low resistance silicon substrate 2 is provided with an electric passage part 6 surrounded by a ring-shaped groove 5, while a wiring film 13 electrically connected to the electric passage part 6 through an opening 8 of the insulating layer 3 is disposed on a rear face 4b of the high resistance silicon substrate 4 and an inner face 11a of a recess 11. Since the high resistance silicon substrate 4 is thus provided with the wiring film 13, an optical semiconductor element 20 and an electronic circuit element 30 which differ from each other in terms of the number and positions of electrode pads can be electrically connected to each other on the front and rear face sides of the multilayer wiring board 1.
摘要:
An optical transmitting and receiving module, with which there is no need to provide a submount for disposing a photodiode on a substrate and with which spatial restrictions can be made small, is provided. An optical transmitting and receiving module 1 has a light transmitting substrate 10. A filter groove 13 is formed on a top surface of light transmitting substrate 10, and a dielectric multilayer film filter 23 is set in filter groove 13. An optical fiber 21 and a laser diode 25 are disposed at opposite positions across dielectric multilayer film filter 23. Also, a photodiode 26 is disposed on a rear surface side of light transmitting substrate 10. Photodiode 26 is positioned directly below a line connecting optical fiber 21 and laser diode 25.
摘要:
An optical transmitting and receiving module, with which there is no need to provide a submount for disposing a photodiode on a substrate and with which spatial restrictions can be made small, is provided. An optical transmitting and receiving module 1 has a light transmitting substrate 10. A filter groove 13 is formed on a top surface of light transmitting substrate 10, and a dielectric multilayer film filter 23 is set in filter groove 13. An optical fiber 21 and a laser diode 25 are disposed at opposite positions across dielectric multilayer film filter 23. Also, a photodiode 26 is disposed on a rear surface side of light transmitting substrate 10. Photodiode 26 is positioned directly below a line connecting optical fiber 21 and laser diode 25.
摘要:
The present invention relates to a high-frequency signal transmitting optical module which can easily realize a high-frequency signal transmission by use of a semiconductor optical device to which a highly versatile metal can package has been applied. In the high-frequency signal transmitting optical module, after fixing, to a rear surface of a stem of the metal can package, fixing portions of the linear outer leads by laser welding, the end portions of the outer leads are bent. By this, the outer leads can be easily attached to the semiconductor optical device. On both sides of the respective lead pins of the semiconductor optical device, since the outer leads extending along these are attached to the rear surface of the stem, ground regions are continuously provided on both sides of the respective lead pins by the stem and respective outer leads, whereby TEM wave transmission lines are formed. Accordingly, high-frequency signals can be transmitted to the semiconductor optical device.