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How does a Bragg reflector work?

How does a Bragg reflector work?

A distributed Bragg reflector (DBR) is a reflector used in waveguides, such as optical fibers. For waves whose vacuum wavelength is close to four times the optical thickness of the layers, the many reflections combine with constructive interference, and the layers act as a high-quality reflector.

How Bragg reflector acts as a mirror?

A Bragg mirror (also called distributed Bragg reflector) is a mirror structure which consists of an alternating sequence of layers of two different optical materials. Each interface between the two materials contributes a Fresnel reflection.

What kind of reflector is a Bragg reflector?

A distributed Bragg reflector ( DBR) is a reflector used in waveguides, such as optical fibers.

How are distributed Bragg reflectors used in VCSELs?

This thesis presents a systematic analysis of the distributed Bragg reflectors (DBRs) which serve as the mirrors around the optical cavity of the VCSELs. It considers various methods to calculate the reflectance and the transmittance of a DBR structure. More specifically, the

What is the bandwidth of a distributed bragg reflector?

Substituting into the formula above gives a bandwidth of about 200 nm for 630 nm light. Distributed Bragg reflectors are critical components in vertical cavity surface emitting lasers and other types of narrow-linewidth laser diodes such as distributed feedback (DFB) lasers and distributed bragg reflector (DBR) lasers.

What kind of mirror is a Bragg mirror?

A Bragg mirror (also called distributed Bragg reflector) is a mirror structure which consists of an alternating sequence of layers of two different optical materials . The most frequently used design is that of a quarter-wave mirror, where each optical layer thickness corresponding to one quarter of the wavelength for which the mirror is designed.