  Devasthal Optical Telescope Integral Field Spectrograph (DOTIFS) is a new
multi-Integral Field Unit (IFU) instrument, planned to be mounted on the 3.6m
Devasthal optical telescope in Nainital, India. It has eight identical,
fiber-fed spectrographs to disperse light coming from 16 IFUs. The
spectrographs produce 2,304 spectra over a 370-740nm wavelength range
simultaneously with a spectral resolution of R=1200-2400. It is composed of
all-refractive, all spherical optics designed to achieve on average 26.0%
throughput from the telescope to the CCD with the help of high transmission
spectrograph optics, volume phase holographic grating, and graded coated e2v 2K
by 4K CCD. We present the optical and opto-mechanical design of the
spectrograph as well as current development status. Optics and optomechanical
components for the spectrographs are being fabricated.
