(57) Abstract Although wave length divided multiplexer (WDM) (30), suparuminesento diode (SLD) (10) transmits output light, with respect to the zone which is almost equal to full width at half maximum (FWHM) SLD bandwidth, it is used, that output carries out role as a IFOG illuminant. Remainder (not being connected,) the spectrum includes two side lobes, these next, are separated from into the lower half and after putting around 2 the center, half which puts around 1 the center with another WDM (40). These side lobes being detected, are supplied to the differential amplifier (50), output of the differential amplifier (50) SLD drive electric current (14) or thermoelectric cooler (TEC) (12) is the error signal which is used in the feedback loop (52) which controls drive electric current, SLD (10) is installed on TEC (12), both of SLD drive electric current and TEC drive electric current, have an influence on the SLD spectrum. Making use of the rear output light of the SLD tip/chip, you can obtain the equal result.
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