Measurements of cavity-length-dependent internal differential quantum efficiency and internal optical loss in laser diodes

Satoshi Inada; Masahiro Yoshita; Makoto Okano; Toshiyuki Ihara; Hidefumi Akiyama; Liming Zhang

doi:10.1143/JJAP.47.2288

Measurements of cavity-length-dependent internal differential quantum efficiency and internal optical loss in laser diodes

Satoshi Inada, Masahiro Yoshita, Makoto Okano, Toshiyuki Ihara, Hidefumi Akiyama, Liming Zhang

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We measured the cavity length dependence of the internal differential quantum efficiency η_int and the internal optical loss α_int in 1500-nm-wavelength laser diodes (LDs). By evaluating α_int directly from gain/absorption spectra for various injection current densities and measuring the external differential quantum efficiency η_ext, we obtained the η_int and α_int values of all the LDs with different cavity lengths. The obtained η_int and α_int respectively showed strong and weak cavity length dependences, and were both very different from those derived by the widely used method of plotting η_ext ^-1 against the cavity length.

Original language	English
Pages (from-to)	2288-2290
Number of pages	3
Journal	Japanese journal of applied physics
Volume	47
Issue number	4 PART 1
DOIs	https://doi.org/10.1143/JJAP.47.2288
Publication status	Published - 2008 Apr 18
Externally published	Yes

Keywords

External differential quantum efficiency
Fabry-Pérot laser
GaInAsP/InP
Gain spectrum
Internal differential quantum efficiency
Internal optical loss
Quantum wells
Semiconductor laser

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.1143/JJAP.47.2288

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Measurements of cavity-length-dependent internal differential quantum efficiency and internal optical loss in laser diodes. / Inada, Satoshi; Yoshita, Masahiro; Okano, Makoto; Ihara, Toshiyuki; Akiyama, Hidefumi; Zhang, Liming.

In: Japanese journal of applied physics, Vol. 47, No. 4 PART 1, 18.04.2008, p. 2288-2290.

Research output: Contribution to journal › Article › peer-review

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abstract = "We measured the cavity length dependence of the internal differential quantum efficiency ηint and the internal optical loss αint in 1500-nm-wavelength laser diodes (LDs). By evaluating αint directly from gain/absorption spectra for various injection current densities and measuring the external differential quantum efficiency ηext, we obtained the ηint and αint values of all the LDs with different cavity lengths. The obtained ηint and αint respectively showed strong and weak cavity length dependences, and were both very different from those derived by the widely used method of plotting ηext -1 against the cavity length.",

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AU - Akiyama, Hidefumi

AU - Zhang, Liming

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