Optical Test Equipment

This paper describes a compact optical channel monitor and a delayed interferometer having free-space optical elements such as lenses or mirrors, as an application of microoptics. These devices have been developed to be built into dense wavelength division multiplexing (DWDM) transmission systems. These optics use a Gaussian beam which is emitted through single-mode optical fibers and located near the optical axis. This paper explains the optical designs of these devices based on the Gaussian beam's behavior.
SANPEI Yoshihiro^*1  SUZUKI Yasuyuki^*2   IEMURA Kouki^*3   ASANO Junichirou^*3

^*1Communication and Measurement Business Headquarters, Optical Communication Measurement Development Department

^*2Communication and Measurement Business Headquarters, Core Technology Development Department

^*3Photonics Business Headquarters, Engineering Department IV

We have developed the AQ2200-136 compact tunable laser source module with a wide wavelength range of 200 nm (1440 to 1640 nm) and a maximum output power of +7 dBm or greater, as a plug-in module for the AQ2200 multi-application test system (MATS). When combined with the AQ2200 series of optical sensors or the AQ6317B/C/AQ6319 optical spectrum analyzer, the AQ2200-136 enables users to measure the wavelength-dependent loss (WDL) of an optical device without any personal computers. In this paper, we describe the features and structure of the AQ2200-136.

We have developed the AQ6375 grating-based desktop optical spectrum analyzer, which can measure an optical spectrum over a wide wavelength range from 1.2 to 2.4 m with high wavelength resolution at high speed. Despite the popularity of desktop optical spectrum analyzers in the telecommunication wavelength region, a large-scale optical spectrum measurement system with a monochromator has commonly been used for measuring the long wavelength region, and so there was a need for a desktop optical spectrum analyzer for long wavelengths. Deep optical absorptions appearing in the long wavelength region around 2 m caused by CO2, NOX and H2O are attracting attention in the environmental and medical fields, and thus sensitive measuring equipment by laser absorption spectroscopy using a near infrared semiconductor laser is becoming more popular. With excellent optical spectrum measurement capabilities (high resolution and high speed), operability and maintenance performance, the AQ6375 optical spectrum analyzer will contribute to the performance improvement and spread of near-infrared semiconductor lasers used in laser absorption spectroscopy.

With improvements in the speed and bandwidth of communication networks in recent years, 10-Gbit/s high-speed optical communications systems are becoming increasingly widespread in core networks, as well as access networks and LANs. Accordingly, devices and modules for use in 10-Gbit/s transmission are being actively developed, causing increasingly fierce price competition. Under these circumstances, the bit error rate testers (BERT) necessary to test these devices and modules are also facing a demand for lower prices. We have explored essential functionality and performance and examined product specifications, with a focus on application to the production of optical transceivers. Consequently, we have developed two compact and economical 10-Gbit/s BERTs, a plug-in module model and a portable model, featuring variable amplitudes, cross-points and voltage offsets for the data output and a built-in clock and data recovery (CDR) function.

Improving and optimizing electric motor performance and efficiency depends on understanding how electric current is measured.

The 40-Gbit/s transport networks that will meet the communication demand of Next-Generation Networks (NGN) are starting to be deployed commercially. To meet the increasing measurement needs of the 40-Gbit/s networks and transmission equipment, we have developed the NX4000 Transport Analyzer. This can accurately and efficiently measure the transmission quality and characteristics of the networks, transmission equipment corresponding to 40-Gbit/s Synchronous Digital Hierarchy (SDH), Synchronous Optical NETwork (SONET), and Optical Transport Network (OTN). This paper describes the various measurement applications of the NX4000 Transport Analyzer.
DAIRI Kenji^*1 SHIDA Hideo^*1 TSUTSUMI Seiichi^*1 TAKAHASHI Kenji<sup>*1

*1</sup>Communications and Measurement Business Headquarters, Optical Communication Measurement Development Department

After a disastrous 2009, the large publicly held test companies enjoyed booming business in 2010.

One of the challenges for engineers involved with the development or maintenance of complex electromechanical systems is to link the behavior in one part of a system to control signals in another. In particular, engineers often need to understand causality: the relationship between an event (the cause) and a second event (the effect) to obtain an insight into an electromechanical system’s overall behaviour and to plan corrective actions accordingly.

No, unfortunately due to the number of current fiber combinations, we do not stock optical fibers. There are many companies that specialize in optical fiber cords.

It is possible to convert an AQ6370 Binary file to ASCII .CSV file using the AQ6370 Viewer Software. Please keep in mind there are different AQ637X series OSA Viewer software will load specific binary file extensions.

If you have products currently in China that require calibration or repair, you may either return them to your local Yokogawa service center or the Yokogawa China Service & Repair Center.   Please be advised that ...

Level Accuracy:Level Accuracy is a tolerance to the true value of measured value, when a standard level is measured with a standard wavelength. Level Linearity:Level Linearity is the width of error dispersion ...

Yes, the AQ7275 has a USB 1.1 port that can be used to remotely control the OTDR.

You can restore all settings for the AQ637X series OSAs to their factor defaults by performing a parameter initialization. This will clear all current parameter setting values and data as well as alignment adjustment ...

Please download the attached application note for instructions on how to make High Bit Rate Modulated OSNR Measurement for the AQ6319 and AQ6370 series Optical Spectrum Analyzer..

To delete all user files from the internal memory of the AQ7270 or AQ7275 Optical Time Domain Reflectometer (OTDR), follow the procedures listed below: Power up the AQ720 or AQ7275 OTDR Press the OTDR soft key Press the FILE key Press the ACTION soft ...

If you are performing wavelength calibration using the instrument's built-in light source, the warning message is an indication that the monochromator needs to be repaired. Please visit our Contact site to locate ...

The AQ6370 OSA cannot load and re-display the data saved by an AQ6370B. However, the AQ6370 Viewer software can display the data saved by both instruments. Also please note that the AQ6370B OSA can load and re-display ...

The warning "142 WL calibration failed" is displayed when a level of light source is not enough at wavelength calibration or calibration cannot be executed because wavelength difference is out of calibration ...

The SU2005A-LCC universal connector is physically compatible with AQ7275, but we do not recommend it because we expect poor connection repeatability and return loss. We cannot guarantee the performance of AQ7275 when ...

The AE5501 cannot test RFC2544. The AE5511 has an optional PC software for performing RFC2544 testing. ​

No, although the basic shape is the same for both the AQ9335 and AQ9335C, the internal physical deisgn for the AQ9335C has been changed slightly to fit the AQ2200 series sensor modules for optimum accuracy. You will ...

Yes, the AQ2200-141/-142 FP-LD modules have a built-in isolator. The isolation is 35dB.

This comprehensive training module covers:

• Introduction & Product Familiarization
• Basic Parameter Setup Steps
• Intuitive Icon-Based Event Detection with Smart Mapper
• Wireless File Transfer with a Smartphone App

This comprehensive training module covers the following topics:

• Introduction & Product Familiarization
• Basic OSA Principles & Theory
• Advanced Analysis Features
• Basic Operations

Université Laval’s photonics group is one of the world’s most highly regarded research centers, conducting fundamental and applied research with the goal to make breakthroughs in the fields of communications, medical diagnosis, advanced optical sensing, and environmental and atmospheric sensing. When the research group’s latest work called for substantial innovation in optical spectral analysis, it turned to its long-term optical testing solutions partner Yokogawa Test & Measurement for help.