X. Liu et al., ELECTRON-BEAM LITHOGRAPHY OF PHASE MASK GRATINGS FOR NEAR-FIELD HOLOGRAPHIC PRODUCTION OF OPTICAL-FIBER GRATINGS, Microelectronic engineering, 35(1-4), 1997, pp. 345-348
This paper reports on processing methods used to produce phase masks f
or near field holographic writing of fibre gratings. The masks are pro
duced using e-beam lithography (EBL) and reactive ion etching (RIE). W
e shall discuss the relations between grating parameters such as ridge
duty cycle and groove-depth and processing conditions such as exposur
e dose and resist profiles.