Effect of wavelength detuning on spectral and temperature characteristics of 1.3-um DFB lasers

Seung Jo Jeong; Jung Koo Kang; K. S. Oh; Byung Kwon Kang; Tae-Jin Kim; Y. K. Sin

doi:10.1117/12.273810

2 May 1997 Effect of wavelength detuning on spectral and temperature characteristics of 1.3-um DFB lasers

Seung Jo Jeong, Jung Koo Kang, K. S. Oh, Byung Kwon Kang, Tae-Jin Kim, Y. K. Sin

Proceedings Volume 3001, In-Plane Semiconductor Lasers: from Ultraviolet to Midinfrared; (1997) https://doi.org/10.1117/12.273810
Event: Photonics West '97, 1997, San Jose, CA, United States

Abstract

Spectral characteristics of 1.3 micrometers DFB lasers with different wavelength detunings are investigated at various temperatures ranging from 20 to 80 degree(s)C. DFB lasers have different amounts of detuning at RT: almost no detuning, a positive detuning of 5 nm and a negative detuning of 25 nm. AR-HR coated 300 micrometers long DFB lasers have typical CW threshold currents of 9 mA, slope efficiencies of 0.27 mW/mA, and coupling coefficients (K) of 60 cm^-1. For the DFB LD with a positive detuning, the detuning of +5 nm at 20 degree(s)C is changed to -15 nm at 80 degree(s)C with the SMSR of 38 dB maintained. Whereas, at 80 degree(s)C Fabry-Perot modes appear from the DFB LD with a negative detuning and a smaller SMSR of 35 dB is obtained from the DFB LD with almost no detuning. These results indicate that a DFB LD with a positive detuning shows better spectral characteristics than others.

Citation Download Citation

Seung Jo Jeong, Jung Koo Kang, K. S. Oh, Byung Kwon Kang, Tae-Jin Kim, and Y. K. Sin "Effect of wavelength detuning on spectral and temperature characteristics of 1.3-um DFB lasers", Proc. SPIE 3001, In-Plane Semiconductor Lasers: from Ultraviolet to Midinfrared, (2 May 1997); https://doi.org/10.1117/12.273810

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