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Anti-Reflection Coated Laser Diodes

US Patent 6,297,066 | US Patent 6,869,483

Description:

Laser diodes with AR Coating, 370nm .. 2400nm, output facet with high quality AR coating, patented method, up to 300mW, excellent performance within ECDL system, check our stock list for availability. Sacher Lasertechnik was the first business offering high quality anti-reflection coated diodes since 1992.
Anti-Reflection Coated Laser Diodes

Innovation:
Sacher Lasertechnik was the first business to introduce anti-reflection coated diodes into the world market as early as 1992. First successful anti-reflection coatings were realized as early as 1987 at Marburg University.

Introduction:
Diode lasers are cost effective opto-electronic devices which cover a wide variety of applications. For most applications in the field of measuring and sensing, there is an improvement of the spectral properties needed. Technically, this is realized by using external cavities. For a proper coupling of the external cavity to the diode laser, an anti-reflection coating of the front facet of the diode laser is required. 

Benefit of AR-coated diode lasers, Laser Performance:
Our anti-reflection coated diode lasers give the laser system the performance of a turnkey system. These is no longer the need for a long term search of the current and temperature values of the operating point. Our customers benefit from our experience of more than 15000 installed anti-reflection coated diode lasers in experimental and industrial laser systems. Make sure to include the Original Anti-Reflection Coating within your laser system. 

Benefit of AR-coated diode lasers, Wavelength Tuning:
Using our anti-reflection coated diode lasers within an external cavity laser system increases the total tuning range of diode lasers up to a factor of 2 in comparison with standard diode lasers. Spectral regimes beside standard wavelengths are easily accessible. 

Benefit of AR-coated diode lasers, Large Mode-hop free Tuning Range:
Employing standard diode lasers within an external cavity laser system causes a coupled cavity system. This results in the coherence collapse (Sacher et al., Phys. Rev. A45, 1893 (1992)) and only very small tuning ranges of a few GHz can be reached.  The performance of our anti-reflection coated diode lasers enables our laser systems for large mode-hop free spectral tuning. Our external cavity Littman laser system is especially designed for achieving high mode-hop free tuning range.

Specifications:
R<=5E-4, typical values R<=5E-5. For our standard coatings, we specify the minimum of the reflectivity to be below 5E-4. Typical values are R<=5E-5. These excellent values are a result of more than 10 years of experience in the manufacturing of anti-reflections coatings (US Patent 6,297,066). 

Measuring the Reflectivity of diode lasers:
A direct measurement of the reflectivity of diode lasers is barely possible due to the small size of the laser chip. Therefore, we use an indirect method of determining the reflectivity by the method of Kaminov et al., IEEE J. Quantum Electron., QE-19, 493 (1983). An example of applying this method to the newly released GaN laser diodes is given by Hildebrandt et al., published in Applied Optics, April 2003. 

Effect of AR-coatings on diode lasers:
Anti-reflection coating causes a significant change of the physical properties of diode lasers. The most obvious effect is the change of threshold current and of spectral properties. 

Quality Management:
Each anti-reflection coated diode laser will be delivered with an individual datasheet. This datasheet provides information on the change of the PI-curve as well as on the spectral performance of the device. 

Lifetime Data:
We have performed lifetime testing on a 25 unit batch of our anti-reflection coated diode lasers employing the accelerated aging method. As a result, we have found the mean time to failure (MTF) not to be affected by anti-reflection coatings as long as the diodes are driven under reasonable conditions. Please check the links for details. 

Manufacturing Capabilities: 
Sacher Lasertechnik operates a full technology line for the assembly and the antireflection coating of diode lasers. 

Laser Bar Coating:
Sacher Lasertechnik has developed a unique method of performing anti-reflection coatings for laser bars, c/f US Patent 6,297,066.

 More DetailsWavelength Power Littrow Power Littman Tuning (total) Mount   
 SAL-0395-030390-405nm 30mW n/a >2nm TO56     
 SAL-0405-030400-410nm 30mW n/a >2nm TO56     
 SAL-0410-030408-412nm 30mW n/a >2nm TO56     
 SAL-0416-030405-430nm 30mW n/a >2nm TO56     
 SAL-0425-030415-430nm 30mW n/a >2nm TO56     
 SAL-0452-030442-462nm 30mW n/a >2nm TO56     
 SAL-0461-030455-465nm 30mW n/a >2nm TO56     
 SAL-0488-010483-493nm 10mW n/a >2nm TO56     
 SAL-0635-010633-640nm 10mW n/a 7nm TO56     
 SAL-0640-030638-642nm 30mW n/a 4nm TO56     
 SAL-0655-025650-665nm 25mW n/a >15m TO56     
 SAL-0670-020656-680nm 20mW n/a 14nm TO09     
 
 SAL-0690-025675-700nm 25mW n/a 15nm TO56     
 SAL-0705-020695-715nm 20mW n/a 20nm TO56     
 SAL-0730-030725-738nm 30mW n/a 13nm TO56     
 SAL-0780-100740-790nm 100mW n/a 40nm TO09     
 SAL2-0780-100775-795nm 100mW n/a 20nm CMT02     
 SAL-0810-100780-820nm 100mW n/a 40nm TO09     
 SAL-0830-100810-840nm 100mW n/a 30nm TO09     
 SAL2-0830-100790-850nm 100mW n/a 60nm CMT02     
 SAL-0850-060840-885nm 60mW n/a 45nm TO09     
 SAL-0930-100875-955nm 100mW n/a 80nm TO09     
 SAL-0960-100990-985nm 100mW n/a 85nm TO09     
 SAL-1060-060990-1085nm 60mW n/a 95nm TO09     
 SAL-1120-1001080-1140nm 100mW n/a 60nm TO09     
 SAL2-1320-0301270-1370nm 30mW n/a 100nm CMT02     
 SAL-1390-0301340-1450nm 30mW n/a 90nm CMT02     
 SAL2-1550-0301470-1580nm 100mW 30mW >100nm CMT02     
 SAL-1650-0301600-1780m 30mW n/a 180nm CMT02     
 SAL-2020-0201940-2080m 20mW n 140nm CMT02     
 SAL-2300-0032250-2350nm 5mW n 120nm CMT02     
 SAL-2450-0032300-2500nm 3mW n/a 200nm CMT02     

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