Novel self-consistent method for determining optical coupling coefficients and grating losses of distributed Bragg reflector lasers

Hoshin H. Yee

doi:10.1117/1.1465428

1 May 2002 Novel self-consistent method for determining optical coupling coefficients and grating losses of distributed Bragg reflector lasers

Hoshin H. Yee

Author Affiliations +

Optical Engineering, Vol. 41, Issue 5, (May 2002). https://doi.org/10.1117/1.1465428

Based on the stopband width measurement, the coupling coefficient of distributed feedback (DFB) lasers can be estimated with reasonably good accuracy. However, to characterize distributed Bragg reflector (DBR) lasers, many researchers have used the calculated coupling coefficient, since the stopband width from the reflectivity profile of the lasers is more difficult to clarify for this estimation compared to that of DFB lasers. It is especially true when grating losses due to scattering and absorption are large and difficult to measure for the surface grating devices. In this case, estimation of the coupling coefficient becomes more problematic or even erroneous. This work uses a novel method that involves implementing the relationship between the real and effective grating lengths and mode spacing under the subthreshold to determine the coupling coefficient and grating losses of DBR lasers. Through a self-consistent approach, for DBR lasers with a geometry of La =420 ?m and Lg=380 ?m, where La and Lg are the active-section and grating-section lengths, respectively, a coupling coefficient of 45 cm21 and grating losses of 38 cm-1 at the lasing wavelength of 833 nm were estimated with relatively low uncertainty of 10%.

©(2002) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Hoshin H. Yee "Novel self-consistent method for determining optical coupling coefficients and grating losses of distributed Bragg reflector lasers," Optical Engineering 41(5), (1 May 2002). https://doi.org/10.1117/1.1465428

Published: 1 May 2002

ACCESS THE FULL ARTICLE

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: $24.00

Non-members: $28.00 ADD TO CART

JOURNAL ARTICLE
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Reflectivity

Waveguides

Distributed Bragg reflectors

Refractive index

Lanthanum

Optical communications

Optical engineering

Show All Keywords

Keywords/Phrases

Search In:

Publication Years