Two laser mirrors with a Bragg mirrors and diffraction grating were designed to achieve single-mode emission. At normal incidence, the reflected transverse electric (TE) and transverse magnetic (TM) polarized beams exhibit a phase difference near π and, in the case of the output coupler, a difference in the reflected amplitude. Laser mirrors with suitably adjusted di-attenuation and di-retardance can be used to achieve single-mode emission of a microchip laser without additional intracavity elements by canceling axial hole burning and suppressing the undesired competing polarization eigenstate. An integrated microchip laser design is also presented to support the potential of delivering a monolithic and compact solution for single-mode emission.
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