A bend insensitive fiber optic cable, characterized by: a bend insensitive singlemode fiber; a tight buffer layer surrounding the fiber, wherein the layer includes a thin inner layer of an ethylene/ethyl acrylate resin to facilitate stripping of the buffer layer away from the fiber, an outer layer of a material selected from the group including nylon, poly(butylenes terephthalate), polyesters, and UV-cured materials, and the outer layer has an elastic modulus greater than 515 MPa (75,000 psi); and an outer jacket surrounding the buffer layer, wherein the jacket has a thickness of at least 1.2 mm and an outside diameter of approximately 4.7 mm, wherein the singlemode fiber comprises a core and a cladding region for propagating light in a fundamental transverse mode, and the cladding region includes: (i) an outer cladding having a refractive index less than the refractive index of the core (n core), (ii) an annular pedestal region having a refractive index (n ped) higher than that of the outer cladding and |n core - n ped | < 0.003, (iii) an annular inner trench region disposed between the core and the pedestal region, the inner trench region having a refractive index (n inner trench) less than that of the outer cladding, and (iv) an annular outer trench region disposed between the pedestal region and the outer cladding, the outer trench region having a refractive index (n outer trench) less than that of the outer cladding, wherein at least one of |n inner trench - n core | and |n outer trench - n core | > 0.007, wherein an interface between the outer cladding and the outer trench region is located at a radial distance of 17 to 23 μm from the center of the core; and wherein the tight buffer layer has sufficient resistance to deformation from bending on a local level so that the attenuation in a length of the cable increases by not more than 0.04 dB at a wavelength of 1550 nm when the length of the cable is routed to conform with a 90-degree corner at which the bend radius of the fiber is not more than 5.6 mm. a bend insensitive singlemode fiber; a tight buffer layer surrounding the fiber, wherein the layer includes a thin inner layer of an ethylene/ethyl acrylate resin to facilitate stripping of the buffer layer away from the fiber, an outer layer of a material selected from the group including nylon, poly(butylenes terephthalate), polyesters, and UV-cured materials, and the outer layer has an elastic modulus greater than 515 MPa (75,000 psi); and an outer jacket surrounding the buffer layer, wherein the jacket has a thickness of at least 1.2 mm and an outside diameter of approximately 4.7 mm, wherein the singlemode fiber comprises a core and a cladding region for propagating light in a fundamental transverse mode, and the cladding region includes: (i) an outer cladding having a refractive index less than the refractive index of the core (n core), (ii) an annular pedestal region having a refractive index (n ped) higher than that of the outer cladding and |n core - n ped | < 0.003, (iii) an annular inner trench region disposed between the core and the pedestal region, the inner trench region having a refractive index (n inner trench) less than that of the outer cladding, and (iv) an annular outer trench region disposed between the pedestal region and the outer cladding, the outer trench region having a refractive index (n outer trench) less than that of the outer cladding, (i) an outer cladding having a refractive index less than the refractive index of the core (n core), (ii) an annular pedestal region having a refractive index (n ped) higher than that of the outer cladding and |n core - n ped | < 0.003, (iii) an annular inner trench region disposed between the core and the pedestal region, the inner trench region having a refractive index (n inner trench) less than that of the outer cladding, and (iv) an annular outer trench region disposed between the pedestal region and the outer cladding, the outer trench region having a refractive index (n outer trench) less than that of the outer cladding, wherein at least one of |n inner trench - n core | and |n outer trench - n core | > 0.007, wherein an interface between the outer cladding and the outer trench region is located at a radial distance of 17 to 23 μm from the center of the core; and wherein the tight buffer layer has sufficient resistance to deformation from bending on a local level so that the attenuation in a length of the cable increases by not more than 0.04 dB at a wavelength of 1550 nm when the length of the cable is routed to conform with a 90-degree corner at which the bend radius of the fiber is not more than 5.6 mm.