Spectral dependence of propagation loss in InP/InGaAsP antiresonant reflecting optical waveguides grown by chemical beam epitaxy

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Abstract
We present direct measurement of low propagation loss in InP‐core antiresonant reflecting optical waveguides (ARROW’s) at wavelengths that are strongly absorbed in the directly adjacent InGaAsP reflector layers. With 1.54‐μm luminescence peak InGaAsP reflector layers, losses range from a low value of ∼0.9 dB/cm at 1.67 μm to ∼6.5 dB/cm at a wavelength of 1.515 μm for which the reflector layer losses approach 104 dB/cm. This proves the suitability of the ARROW geometry for providing large mode, low propagation loss guides for wavelengths that may either be generated, experience gain, or absorption within the reflector layers.