this review article by martin e. fermann and ingmar hartl, published in nature photonics 7, 868–874 (2013), originally had an incorrect doi specified as 10.1038/nphoton.2013.270. the correct doi is 10.1038/nphoton.2013.280. this correction has been made in both the html and pdf versions of the review article. the article discusses ultrafast fibre lasers, which are a type of laser that can generate very short pulses of light, typically in the femtosecond range. these lasers have a wide range of applications, including precision cutting, micromachining, and optical communications. the review provides an overview of the development and current state of ultrafast fibre lasers, highlighting their advantages such as high repetition rates, compact size, and high power. the authors also discuss the challenges associated with these lasers, such as mode locking and pulse shaping. the review emphasizes the importance of ultrafast fibre lasers in various scientific and industrial applications, and their potential for future development. the correction to the doi ensures that the article can be properly cited and accessed.this review article by martin e. fermann and ingmar hartl, published in nature photonics 7, 868–874 (2013), originally had an incorrect doi specified as 10.1038/nphoton.2013.270. the correct doi is 10.1038/nphoton.2013.280. this correction has been made in both the html and pdf versions of the review article. the article discusses ultrafast fibre lasers, which are a type of laser that can generate very short pulses of light, typically in the femtosecond range. these lasers have a wide range of applications, including precision cutting, micromachining, and optical communications. the review provides an overview of the development and current state of ultrafast fibre lasers, highlighting their advantages such as high repetition rates, compact size, and high power. the authors also discuss the challenges associated with these lasers, such as mode locking and pulse shaping. the review emphasizes the importance of ultrafast fibre lasers in various scientific and industrial applications, and their potential for future development. the correction to the doi ensures that the article can be properly cited and accessed.