ANSI Z136.2 PDF

Many scientists involved with lasers agree on the following guidelines: [21] [22] [23] [24] [25] Everyone who uses a laser should be aware of the risks. This awareness is not just a matter of time spent with lasers; to the contrary, long-term dealing with invisible risks such as from infrared laser beams tends to reduce risk awareness, rather than to sharpen it, primarily due to complacency. Optical experiments should be carried out on an optical table with all laser beams travelling in the horizontal plane only, and all beams should be stopped at the edges of the table. Users should never put their eyes at the level of the horizontal plane where the beams are, in case of reflected beams that leave the table.

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You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. The communications industry was revolutionized in the s with the advent of optical fiber communications systems OFCS consisting of diode lasers emitting andi light signals at wavelengths chosen for transmission with minimal loss in high purity glass fibers.

Already Subscribed to this document. These systems can carry high-powered, optically amplified signals in the Class 3B and, eventually, Class 4 laser power ranges. Over the past several years, the laser safety standards community has been working on updating the standards so as to address this emerging technology.

This standard addresses hazards and provides guidance for the safe use, maintenance, service, and installation manufacturer of optical communications systems OCS utilizing laser diodes or light emitting diodes LED operating at wavelengths between 0.

This technology is gaining popularity in the communications industry based on various advantages, including the fact that this portion of the spectrum is not regulated by the FCC, and frequency coordination is not required does not produce radiofrequency interference.

Proceed to Checkout Continue Shopping. If the document is revised or amended, you will be notified anxi email. Available for Subscriptions Available in Packages Standard is included in: We have no amendments or ahsi for this standard. IEC recognizes that an OFCS is technically a Class 1 laser system because, under intended operation, the optical radiation is totally enclosed.

Join or Renew Members Only. Hazard Level 4, analogous to a Class 4 laser, is not permitted in any location. Your Alert Profile lists the documents that will be monitored. Please first verify your email before subscribing to alerts. The high bandwidth and low noise of optical systems led to their rapid adoption in undersea as well as landline communications networks.

This standard is also available to be included in Standards Subscriptions. This means that any OFCS carrying Class 4 optical power levels needs to incorporate control mechanisms to reduce the power to an acceptable hazard level in the case of a reasonably foreseeable event that anxi permit access to the radiant energy from a fiber or cable.

EDFAs are further advancing OFCS technology by enabling simultaneous transmission of multiple signals of different wavelength in each optical fiber. Subscription pricing is determined by: If automatic power reduction APR is used, the normal level of power in the fiber and the speed of the APR system determine the hazard level. She received a B. Hazard levels are assigned values from 1 to 4 based ansj the customary laser accessible emission limits AELs ; for example, Hazard Level 1 does not exceed the AEL for laser Class 1, ans.

Please first log in with a verified email before subscribing to alerts. This standard is also available in these packages:. You may delete a document from your Alert Profile at any time. Need more than one copy? It recognizes that, under normal operation, an OFCS is completely enclosed and that no optical energy is accessible to the operator or incidental personnel inherently Class 1.

However, IEC also recognizes andi such a classification may not reflect accurately all potential hazards. Standards Subsctiption may be the perfect solution. However, it also ahsi that, during service operations, optical connectors are removed and there is a risk of exposure to optical energy if the system is energized.

In the s, optical amplifiers called erbium-doped fiber amplifiers EDFA began replacing electro-optical systems for long-distance OFCS signal regeneration and amplification. The service group hazard classification scheme considers the special viewing conditions when cables are severed or disconnected. Related Articles

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ANSI Z136.2

You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. The communications industry was revolutionized in the s with the advent of optical fiber communications systems OFCS consisting of diode lasers emitting andi light signals at wavelengths chosen for transmission with minimal loss in high purity glass fibers. Already Subscribed to this document. These systems can carry high-powered, optically amplified signals in the Class 3B and, eventually, Class 4 laser power ranges. Over the past several years, the laser safety standards community has been working on updating the standards so as to address this emerging technology. This standard addresses hazards and provides guidance for the safe use, maintenance, service, and installation manufacturer of optical communications systems OCS utilizing laser diodes or light emitting diodes LED operating at wavelengths between 0.

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