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Mode partition noise in gain-guided lasers at 850 nm and its impact on analog fiber-optic transmission systems

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Abstract

Wideband analog fiber-optic transmission links require optical sources with wide modulation bandwidths and high launch powers. Gain-guided lasers present an attractive solution for medium distance links using graded-index fiber at 850 nm.1 The low level of mode partitioning, characteristic of these devices, produces only very low levels of modal noise, but it has been found that the carrier to noise ratio (CNR) over links of <5 km is limited, however, by laser mode partition noise.

© 1985 Optical Society of America

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