Dr. Christian Blumer Profile

Dr. Christian Blumer

at Coherent Corp

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 4 March 2019 Paper

Towards 300 W high power laser bars

Jürgen Müller, Rainer Bättig, Vinzenz Beer, Christian Blumer, Reinhard Brunner, Jarkko Telkkälä, Johanna Wolf

Proceedings Volume 10900, 109000C (2019) https://doi.org/10.1117/12.2509604

KEYWORDS: Epitaxy, High power lasers, Reliability, Laser development, Metalorganic chemical vapor deposition, Laser applications, Yield improvement, Manufacturing, Laser systems engineering

Read Abstract +

Industrial quality high power laser bars operated at 250 W output power are in volume production. Beyond the output power high conversion efficiency, polarization purity and beam quality are key requirements in high power applications. The latter requires controlling the chip beam parameter, especially the slow axis blooming, as well as the flatness or “smile” of the packaged device. The chip and package endurance must be carefully considered in the design. Our new MOCVD-based high power laser platform enables power conversion efficiencies of above 65% over the entire 920 nm to 1080 nm wavelength range at 250 W output power and at drive currents ranging from 250 to 285 A. Endurance test results show the high reliability of the chip and the fully AuSn hard soldered micro channel cooler package. Random emitter failures are the single relevant degradation mechanism present. At normal operating condition a degradation rate as low as 0.2% in 1000 h operation, obtained in 13’000 h test time indicates a MTTF of 100,000 h. Results of the QCW life-tests are in agreement with the CW tests and confirm the robustness of the fully AuSn hard soldered assembly. Also the micro channel cooler shows no sign of degradation from corrosion. The established 250 W MOCVD-epitaxy based platform is now paving the way to 300 W and later 350 W output power. Devices with 420W peak power and rollover currents of 550 A at 1040 nm wavelength were demonstrated.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years