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EOT Focus - Our New Cleanroom & Photonics West 2016!
ㆍ작성자: 전재필	ㆍ작성일: 2016-02-01 (월) 08:54	ㆍ조회: 726

In This Issue:

Come visit EOT at BiOS & Photonics West 2016
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Introducing: Our New Cleanroom!
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Technical Notes: Broadband Isolators

BiOS & Photonics West 2016

Come visit EOT in San Francisco, CA, February 13-18

Every year, EOT exhibits at several laser industry trade shows. We will again be attending SPIE Photonics West this year, February 16-18, and invite you to Booth 2500 to view our latest technologies, meet with our representatives, and learn more about our products.

We are also very excited to be attending SPIE BiOS again this year as well, February 13-14. Come visit us at Booth 8826!

We will be introducing our New! ET-2070 Silicon, UV-enhanced Photodetector, which features a large active area of 2.55mm and a rise and fall time of 3ns.

Introducing: EOT's New & Improved Cleanroom

In October of 2015, Electro-Optics Technology moved into its new facility. In the center of the building sits a 15,000 square ft. state-of-the-art cleanroom. This space was professionally designed to meet specific cleanliness requirements. Most of our general isolator manufacturing is done in an ISO 6 or Class 1000 cleanroom. EOT is adhering to ISO 14644 cleanroom standards, in that, the air is exchanged around 200 times per hour providing an exceptionally clean work environment. As per the ISO 14644 requirements, our employees go through a strategic gowning procedure before entering the cleanroom. Each year, the cleanroom will be audited and certified to ensure we are meeting these requirements. EOT has made this investment to ensure we maintain our leadership position in high power optical isolators.

ISO 14644-1 cleanroom standards¹

ISO 14644-1: Classification of air cleanliness
·         ISO/DIS 14644-1.2(2014): Classification of air cleanliness by particle concentration
·         ISO 14644-2: Specifications for testing and monitoring to prove continued compliance with ISO 14644-1
·         ISO/DIS 14644-2.2(2014):Monitoring to provide evidence of cleanroom performance related to air cleanliness by particle concentration
·         ISO 14644-3: Test Methods
·         ISO 14644-4: Design, Construction, and Start-up
·         ISO 14644-5: Operations
·         ISO 14644-6: Vocabulary
·         ISO 14644-7: Separative devices (clean air hoods, gloveboxes, isolators and minienvironments
·         ISO 14644-8: Classification of airborne molecular contamination
·         ISO 14644-9: Classification of surface particle cleanliness
·         ISO 14644-10: Classification of Surface Cleanliness by Chemical Concentration
·         ISO 14644-12: Classification of Air Cleanliness by Nanoscale Particle Concentration
¹ ISO 14644 Standards IEST.org

Technical Notes: Broadband Isolators

Broadband Isolators for Ti:Sapphire and Other Tunable Lasers

Some applications, such as isolating individual amplifiers in a Ti:Sapphire amplifier chain while maintaining the ability to tune rapidly over the amplifier bandwidth or isolating a femtosecond oscillator from a Ti:Sapphire regenerative amplifier, require isolators that are wavelength independent. Unfortunately, standard isolators are only capable of providing high isolation and transmission over a narrow range of wavelengths, usually about 30-40nm. For this reason we make broadband isolators. Broadband isolators are unique in that they are passive devices which provide high isolation and good transmission over a 250nm range simultaneously. Below, Figure 1 shows the transmission and isolation of our broadband isolators centered at 800nm. As these curves demonstrate, it is possible to construct a Faraday isolator that can provide >30dB isolation and >70% transmission simultaneously over a very large wavelength range.

Figure 1: Typical Broadband Isolator Performance

A broadband isolator achieves its wide bandwidth by compensating for the dispersion in the Faraday rotator optic. While the direction of polarization rotation in a Faraday rotator is dependent upon the direction of the rotator’s magnetic field, the direction of rotation in a crystal quartz rotator is dependent upon the direction of light propagating through it. By using a 45° crystal quartz optical rotator and aligning the Faraday rotator and crystal quartz rotator such that they rotate the polarization of back-reflected light in opposite directions, the isolator becomes less wavelength-dependent. If 45° rotation at the center wavelength is used for both the Faraday rotator and crystal quartz rotator, the net rotation will be 0° in the reverse direction and 90° in the forward direction.

In femtosecond Ti:Sapphire lasers, pulse broadening caused by dispersion in the Faraday rotator optic is a major concern. Below is the Sellmeiers Equation for TGG:

For more information on our Broadband Isolators, please contact sales@eotech.com or visit our Technical Notes page on our website, www.eotech.com.

제조사: www.eotech.com
제조국: USA

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