A new method is proposed for the optical summation

Elimination of relative noise intensity in lines with external modulation in the passband.

A new method is proposed for the optical summation of time-shifted complementary signals in order to eliminate the relative intensity noise in an optical line with narrow-band external modulation. A noise reduction of ~ 12 dB at a frequency of 4 GHz was experimentally obtained.

40 Gbps full optical data regeneration and demultiplexing with long code lengths using a non-linear semiconductor interferometer.

Fully optical regeneration with a speed of 40 Gbit / s 2 31 -1 datum and (40-10) Gbit / s demultiplexing the regenerated data was experimentally demonstrated. In the experiment. The circuit used a semiconductor nonlinear interferometer with an integrated optical amplifier with optimized characteristics for these purposes. The operation of the device without errors was achieved, and at the same time, the simultaneous conversion of the wavelength was not used. Developed device m. used as a high-speed (=40 Gbit / s) fully optical 3 R regenerator.

Fiber optic cable technician salary

Optical frequency conversion using a linearized modulator on LiNbO 3.

An experimental scheme of an optical frequency converter with a wide dynamic range is presented. The scheme uses a third-order linearized modulator on LiNbO 3. Max. dynamic range - 122.5 dB Hz 4/5 achieved at an input frequency of ~ 400 MHz.

Polymer optical waveguides for controlling phased optical arrays.

Optical delay elements based on optical polymer waveguides for antenna systems with phased arrays are described. In the manufacture of ultra-low-loss optical waveguides, photolithography technology is used. The amount of insertion delay reaches several tens of ns, with a resolution of ≤1 ps. As part of the delay element, a PD is used, with the help of which the paths are switched with the choice of the delay time. System m. used to control phased array antennas in the range 11 ... 40 GHz. The generation of microwave signals with optical coding is performed using heterodyne devices based on semiconductor lasers. The system is made in the form of a monolithic microwave range IC.
The bandwidth of quad AM systems with subcarrier multiplexing using a Mach-Zehnder modulator as a transmitter.

The results of calculating the constraints imposed on the system throughput with quadrature AM channel subcarrier multiplexing and a laser transmitter with external modulation carried out by an optically linear Mach-Zehnder modulator, nonlinear distortion, and Gaussian noise are presented. The standard was calculated. a fiber-optic system with a total bandwidth of ~ 1.4 Gbit / s, coefficient single-bit error ~ 10 –9 and quadrature AM on 64 channels.
Suppression of stimulated Brillouin scattering in an optical communication system.

An optical transmitter circuit is proposed for a single-mode fiber communication system. The transmitter has a high output radiation power and significantly broadens the spectral width of the laser source used in it. The transmitter in question is capable of suppressing stimulated Brillouin scattering.
About the speeds of optical processing and transmission of information
google fiber technician salary
The possibility of increasing the speed of processing and transmitting information when using time compression, spatial and spectral separation of information flows is considered. It is shown that the processing speed of information in optical systems can reach ~ 10 16 bit / s, and the transmission speed over optical fiber - up to 10 14 bit / s.

Two-way optical transmission system and optical transceiver for pulse data.

The structure of a duplex fiber optic transmission system designed to transmit pulsed information is proposed. The system is able to adjust the deviation in the ratio between the speeds, for example, when transmitting a signal from the transceiver to the user and vice versa. An optical pulsed information transceiver has been developed, which can used in an optical access system for subscriber systems or KTV in which dense spectral multiplexing is used.

Fiber optic processing

Most optical cable systems use sheathed glass fiber. The latter provides the necessary strength, simplifies the handling of the fiber and allows the manufacturer to mark the fibers with different colors in order to visually identify them. During the installation of connectors or cable splices, the sheath is removed, which allows you to combine the fibers with the required accuracy. At the time of removal of the sheath, a number of questions arise regarding the proper handling of tools and chemicals, the processing of fiber and the disposal of its fragments. As soon as the outer sheath is removed, the fiber becomes unprotected and breaks easily. The probability of fiber fragments getting under the skin at this moment is greatest. Therefore, it is advisable to equip the workplace so that it is safe.

Mats and tables suitable for this are produced by many manufacturers. The surface of the table should have a coating that contrasts in color with the fiber being processed, and this is just one of the conditions for more convenient and safe operation. For laboratory and industrial premises, a black, non-reflective and chemical-resistant work surface that is easy to clean; the design of the table should be such that no fragments of fiber accumulate in its seams and at the edges.

For field conditions, black mats with a matte finish are recommended; Their main quality is lightweight and transportability (they are easily rolled up and stored in a toolbox). An alternative can be three types of work tables. For telecommunication rooms, a small light table is best suited. A safe working environment requires a non-reflective work surface and a container for trimming fiber. For cable splicers, longer tables with height adjustment are best suited. It is also desirable to have good lighting, magnifying glasses, and devices for attaching cables to protect them from damage.
Also Read: fiber optics technician
The goose-neck lamps, which are very good both in the laboratory and in the field, illuminate the workplace well.

Protective glasses.

When working with Class 3 lasers, personnel should wear safety glasses with appropriate filters. Professionals dealing with components based on VCSEL lasers should wear safety glasses designed for a wavelength of 850 nm. In addition, they should be equipped with filters with optical density (optical density - OD), corresponding to a specific application. For example, with an OD of unity, the attenuation of transmitted optical radiation is 10 dB; with an OD equal to 2, - 100 dB, etc. Knowing the output optical power of the radiation source, it is possible to determine the required OD value, which reduces the power of the transmitted radiation to a safe level.

When processing fibers, especially when installing connectors and splicing cables, ordinary safety glasses are quite suitable. In normal operation, they prevent fiber fragments from entering the eyes. However, suppose you suddenly wanted to rub your eyes. If at the same time pieces of fiber are stuck to the hands, such a seemingly innocuous desire can negate the protective function of safety glasses: the fiber fragments are small and transparent, they can easily stick to the skin, remaining invisible. For the same reason, it is recommended to wash your hands more often, and this will be another means of protecting the eyes. Since the work with glasses is necessary and they will have to be carried out for a long time both in the laboratory and in the field, special attention should be paid to their design and convenience.

Fiber optic benefits

With proper design of the future system (this stage involves the solution of architectural issues, as well as the selection of suitable equipment and methods for connecting the carrier cables) and professional installation, the use of fiber-optic lines provides a number of significant advantages:

• High throughput due to high carrier frequency. The potential of one optical fiber is several terabits of information in 1 second.
• Fiber optic cable has a low noise level, which positively affects its bandwidth and the ability to transmit signals of various modulation.
• Fire safety (fire resistance). Unlike other communication systems, FOCL can be used without any restrictions at high-risk enterprises, in particular at petrochemical plants, due to the absence of spark.
• Due to the low attenuation of the light signal, optical systems can combine working areas at considerable distances (more than 100 km) without the use of additional repeaters (amplifiers).
• Information Security. Fiber-optic communication provides reliable protection against unauthorized access and interception of confidential information. This ability of optics is explained by the absence of radiation in the radio range, as well as high sensitivity to vibrations. In the case of wiretapping attempts, the built-in monitoring system can disable the channel and warn about suspected hacking. That is why FOCL is actively used by modern banks, research centers, law enforcement organizations and other structures working with classified information.
• High reliability and noise immunity of the system. The fiber, being a dielectric conductor, is not sensitive to electromagnetic radiation, is not afraid of oxidation and moisture.
• Profitability. Despite the fact that the creation of optical systems due to its complexity is more expensive than traditional SCS, in general, its owner receives real economic benefits. Optical fiber, which is made of quartz, costs about 2 times cheaper than copper cable, and additionally, when building extensive systems, you can save on amplifiers. If, when using a copper pair, repeaters need to be installed every few kilometers, then in the fiber optic link this distance is at least 100 km. At the same time, the speed, reliability, and durability of 
• The service life of fiber optic lines is a quarter of a century. After 25 years of continuous use in the carrier system, signal attenuation increases.
• If we compare the copper and optical cable, then at the same throughput, the second one will weigh about 4 times less, and its volume, even when using protective shells, will be several times less than that of copper.
• Prospects. The use of fiber-optic communication lines makes it easy to increase the computing capabilities of local networks thanks to the installation of faster active equipment, and without replacing communications.
• Also check: fiber optic tech salary
• traditional SCS are significantly inferior to optics.

fiber optic technician certification & job discription

Description

The Fiber Optic Installer Certification Course provides participants with the knowledge of installation, connectorization, splicing, testing and measurements of multimode and single-mode optical fiber. They will become experts in installing connectors on various types of fiber optic cables using various types of epoxy and will be able to perform mechanical and fusion splices. Finally, participants have the option of taking the fiber optic technician certification test for the Optical Fiber Installer (FOI) of the International Association of Electronics Technicians Association (ETA-i, accredited by the International Certification Accreditation Council - ICAC ). This course will provide participants with the skills to work in cell phones, cable TV, and communications companies that install, test and maintain fiber optic networks. The course will be attended by an engineer from the telecommunications company CLARO PR for a workshop on the theory, use, and management of an Optical Time-Domain Reflectometer (OTDR)

Course Level: introductory to intermediate

Course duration: 4 days (Saturdays)

Date: February 1, 8, 15 and 22, 2020

Modules:

1. Theory of fiber optic communication (June 1)
2. Technical specifications of the optical fiber (June 8)
3. Fiber optic installation and service (June 15)
4. Preparation for the FOI exam (June 22)
5. Includes as a special bonus the 4-hour workshop of Optical Time-Domain Reflectometry (OTDR) of Engineer Eduardo Acosta, Claro's technical trainer

T Hewlett-Packard Defines Inkjet Printer Resource

How Hewlett-Packard Defines Inkjet Printer Resource
For all Deskjet, Photosmart, Officejet, and All in One inkjet printers sold after July 2005, HP publishes print yield data based on the industry standard for measuring ink cartridge yield for inkjet printers (ISO / IEC 24711). (For laser printers, see in HP Toner ).

according to ISO 24711 testing recommendations, a standard set of five 20.32 x 27.94 pages is printed continuously until the cartridge runs out. Due to various circumstances, such testing conditions may not reflect the actual cartridge life. Therefore, when comparing ISO, the resource measurement standard should only be considered as starting point, not as an accurate prediction of the life of the HP printer and cartridge. The actual resource varies significantly depending on the content of the pages being printed, the frequency of printing, ink used in the preparation and other factors discussed below.

The five standard ISO pages shown below are a combination of text and graphics, and a combination of black and white with color.

ACCESS SEGMENTATION USING WIRELESS AP WITH PALO ALTO

On our wireless controller, we implement AD authentication (without certificates), and the wireless controller is connected to the

Deployment of Palo Alto Firewalls

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Once the user authenticates through AD and joins the wireless network, the Palo-Alto Firewall can see that John Smith has joined the network from device A (some IP). Right?
Does the Palo-Alto Firewall also have the ability to search for groups to which John Smith belongs ? (ex Corporate, Room103, etc.)
If the answer to both of these questions is yes, can we then create a rule on the Palo-Alto firewall saying:

If the user belongs to the AD Room103 group , he may have access to certain resources on the network. (ie things in vlan 's Room 103 )

objective is to use a firewall to segment access. Therefore, when John Smith enters the system from any device (BYOD), he can have access to his resources without using any kind of machine authentication.

This cannot be part of “best practices”; however, this is not a concern. All I want to know is if possible.