A device is used to wavelength lock two optical signals to some frequency offset. A photomixer section produces a frequency test signal from the beat component of the two optical signals. The frequency of the frequency test signal reflects whether the actual frequency offset of the two optical signals equals the desired offset. A frequency filter with a monotonically varying transfer function is used to filter the frequency test signal. Thus different gains are applied to different frequencies. Comparison circuitry uses the filtered signal to determine whether the frequency filter applied the gain which corresponds to the desired frequency offset and generates a corresponding error signal.
申请公布号
WO02069527(A2)
申请公布日期
2002.09.06
申请号
WO2001US49930
申请日期
2001.12.20
申请人
KESTREL SOLUTIONS, INC.
发明人
TARNG, SHIN-SHENG;CHANG, PETER, H.;YAZHGUR, SLAVA;YEE, TING, K.