The phrase "a unique window in" is correct and usable in written English.
It can be used to describe a special opportunity or perspective that allows insight into a particular subject or situation.
Example: "The documentary offers a unique window in the lives of those affected by climate change."
Alternatives: "a distinct perspective on" or "an exclusive insight into".
They were the first color images of the world circulated on a mass stage, and are increasingly being seen by scholars as a unique window into the past, depicting things in contexts absent in other mediums like photography.
Sleep offers a unique window into the brain dysfunctions in schizophrenia.
The model planarian Schmidtea mediterranea has emerged as an experimental system that provides a unique window into major aspects of in vivo stem cell biology, including regeneration, fate determination and homeostatic plasticity (Rink, 2013; Roberts-Galbraith and Newmark, 2015).
High-throughput microarrays assessing global gene expression changes provide a unique window into the molecular events occurring in adipose tissue during the development of obesity.
As President Obama noted at the time, Ms Sánchez's writing gave "the world a unique window into the realities of daily life in Cuba".
US President Barack Obama proclaimed that her blog "provides the world a unique window into the realities of daily life in Cuba" and praised her efforts to "empower fellow Cubans to express themselves through the use of technology". Now, Sánchez has launched 14ymedio, a digital news outlet born out of her efforts to enact social change within Cuba and beyond.
In November 2009, U.S. President Barack Obama, wrote that her blog "provides the world a unique window into the realities of daily life in Cuba" and applauded her efforts to "empower fellow Cubans to express themselves through the use of technology".
The Greater Good offers a unique window into the larger impact of the New Deal in the South.
Tilin amber biota yields the latest known diverse insect assemblage in the Mesozoic27, and provides a unique window into a vanished tropical forest.
The report provides a unique window into one GRU team's effort across six days in 2014.
